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Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 1 of 22
Engineer Licences – Category Engine
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft
Maintenance Engineer Licences – Category
Engines
AAC Number Part 9-92
Issue Number Twenty Eight
Date Amendment May 2012
This AAC contains information on the following topics applicable to
Aircraft Maintenance Engineer Licences – Category Engine:
1. Applicability
2. Definitions
3. Grouping Classifications
4. Licence Ratings and Form of Endorsement
5. Experience Requirements for the Grant of a Licence or Endorsement of a Rating
6. Examination Requirements
7. Engine Ground Run Training
1. Applicability
This AAC specifies the requirements for the grant of an Aircraft Maintenance Engineer Licence
and the endorsement of additional ratings to a licence in the engine category. It is to be read in
conjunction with CAO Section 100.90 Issue 3 and corresponding sub-sections of CAO Section
100.92 Issue 3.
2. Definitions (Refer to CAO Section 100.92 sub-section 2)
Dry Running Engines. There are no regulations or orders which preclude personnel holding
licence categories other than the engine category from motoring the engine. Personnel who have
a requirement to motor engines would need to be qualified on type and appropriately trained to
do so. To develop the training and conduct the assessment the methodology detailed within the
Transit Authorisations AWB 02-4 can be utilised.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 2 of 22
Engineer Licences – Category Engine
3. Grouping Classifications
For engines and systems classified Groups 1, 2 and 3 refer to CAO Section 100.92 sub-section 3.
Note: Engine Group 1 does not cover diesel engines; refer to AAC 9-0 for more information.
Reference should be made to sub-section 4, Tables 1 and 2 of this AAC which lists those engines
classified as Group 21 and Group 22.
4. Licence Ratings and Form of Endorsement
Licence ratings for engines classified as Group 21 and Group 22 are listed in Tables 1 and 2
below. Endorsements on the licence are computer generated from the tables maintained
centrally by Maintenance Personnel Section. The endorsements will follow as closely as
possible the endorsements shown below.
Table 1 - Piston Engines and Gas Turbine Engines in Aeroplanes and Airships Classified
as Group 21 and Form of Licence Endorsement
ENGINE TYPE LICENCE ENDORSEMENT
Allison/Rolls Royce 250-B Allison 250-B Series Group 21
Allison /Rolls Royce 250-C Allison 250-C Series Group 21
Allison 501-D13 Allison 501 Series Group 21
Avco Lycoming ALF 502 Lycoming ALF 502/LF 507 Series Group
21
Avco Lycoming LTP101 Lycoming LTP101 Series Group 21
BMW/Rolls Royce BR715 installed in Boeing
717
BMW-RR BR715 Series (B717) Group 21
BMW/Rolls Royce BR710 installed in
Bombardier BD-710 (Global express)
BMW-RR BR710 (BD-700) Group 21
BMW/Rolls Royce (RRD) BR710 installed in
Gulfstream GV-SP (G500/G550)
RRD BR710 (GV-SP/G500/G550) Group
21
Bristol Centaurus (See Note 1) Bristol Centaurus Series Group 21
Bristol Siddeley Viper B/S Viper Series Group 21
CFM International CFM56 installed in Airbus
A319/A320/A321
CFM56 Series (A319/A320/A321) Group
21
CFMI CFM56 installed in Boeing 737-300/400
(See Note 5)
CFM56 (B737-300/400) Group 21
CFMI CFM56-7B installed in Boeing
737-600/700/700IGW/800/900 (See Note 5)
CFM56 (B737-6/7/8/900) Group 21
Garrett ATF3 Garrett ATF3 Series Group 21
Garrett TFE731 Garrett TFE731 Series Group 21
Garrett TPE 331 (except -14) (See Note 2) Garrett TPE 331 SER to -13 Group 21
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 3 of 22
Engineer Licences – Category Engine
Table 1 - Piston Engines and Gas Turbine Engines in Aeroplanes and Airships Classified
as Group 21 and Form of Licence Endorsement
ENGINE TYPE LICENCE ENDORSEMENT
Garrett TPE 331-14 (See Note 2) Garrett TPE 331-14 Group 21
General Electric CF34-3 (CL600 Series)
(See Note 3)
GE CF34-3 (CL600-Series) Group 21
General Electric CF34-3 (CRJ 100/200)
(See Note 3)
GE CF34-3 (CRJ 100/200) Group 21
General Electric CF34-8 installed in Embraer ERJ
170.100 STD and LR
GE CF34 (ERJ 170) Group 21
General Electric CF34-10 installed in Embraer
ERJ 190.100 STD and LR
GE CF34 (ERJ 190) Group 21
General Electric CF6 installed in Airbus A300 B4 GE CF6 (A300-B4) Group 21
General Electric CF6 installed in Airbus A300-
600/A310
GE CF6 (A300-600/A310) Group 21
General Electric CF6 installed in Boeing 747-400
and 400 (910K) see note 6
GE CF6 Series (B747-400) Group 21
General Electric CF6 installed in Boeing 767 GE CF6 Series (B767) Group 21
General Electric CF6 installed in Airbus A330-
200/300
GE CF6 (A330-200/300)
General Electric CJ610/CF700 GE CJ610/CF700 Series Group 21
General Electric CT7 GE CT7 Series Group 21
General Electric GE 90 installed in B777-200/300 GE 90 (B777-200/300) Group 21
Honeywell AS907 installed in Bombardier
Challenger CL 300
Honeywell AS907 (CL-300) Group 21
International Aero Engines V2500 installed in
A319/A320/321
IAE V2500 (A319/320/321) Group 21
Porsche 930/67 Porsche 930/67 Series Group 21
Pratt & Whitney (C) JT15D P&W (C) JT15D Series Group 21
Pratt & Whitney (C) PT6A P&W (C) PT6A Series Group 21
Pratt & Whitney (C) PW100
(Except installed in DHC-8-400)
(Except installed in ATR42-400/500
P&W (C) PW100 Series Group 21
Pratt &Whitney (C) PW100 installed in ATR2-
400/500 (with Propeller Electronic Control)
P&W (C) PW100 (ATR42 PEC) Group
21
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 4 of 22
Engineer Licences – Category Engine
Table 1 - Piston Engines and Gas Turbine Engines in Aeroplanes and Airships Classified
as Group 21 and Form of Licence Endorsement
ENGINE TYPE LICENCE ENDORSEMENT
Pratt & Whitney (C) PW150 installed in
DHC-8-400
P&W (C) PW150 (DHC-8-400) Group 21
Pratt & Whitney (C) PW 305 P&W (C) PW 305 Series Group 21
Pratt & Whitney (C) PW 306 P&W (C) PW 306 Group 21
Pratt &Whitney (C) PW 308 P&W (C) 308 Group 21
Pratt & Whitney (C) PW 530A& PW535 P&W (C) PW 530 Group 21
Pratt & Whitney (C) PW 545 P&W (C) PW 545 Group 21
Pratt & Whitney (C) PW 600 Series P&W (C) 600 Series Group 21
Pratt & Whitney R2800 P&W R2800 Group 21
Pratt & Whitney PW4000 installed in
A300-600/A310
P&W 4000 (A300-600/A310)Group 21
Pratt & Whitney PW4000 installed in
Airbus A330
P&W 4000 (A330) Group 21
Pratt & Whitney PW4000 installed in
Boeing 747-400
P&W 4000 (B747-400) Group 21
Pratt & Whitney PW4000 installed in Boeing 767 P&W 4000 (B767) Group 21
Pratt & Whitney R1830/R2000 (see note 1) P&W R1830/R2000 Series Group 21
Pratt & Whitney JT3D installed in Boeing 707 P&W JT3D (B707) Group 21
Pratt & Whitney JT8D installed in Boeing 727 P&W JT8D Series (B727) Group 21
Pratt & Whitney JT8D installed in B737-100/200 P&W JT8D Series (B737) Group 21
Pratt & Whitney JT8D installed in Douglas DC9 P&W JT8D Series (DC9) Group 21
Pratt & Whitney JT8D installed in
McDonnell DC9
P&W JT8D (DC9-81/82/83) Group 21
Pratt & Whitney JT9D installed in Boeing 747 P&W JT9D Series (B747) Group 21
Pratt & Whitney JT9D installed in Boeing 767 P&W JT9D Series (B767) Group 21
Rolls Royce Dart RR Dart Series Group 21
Rolls Royce RB211 installed in Boeing
747-200/300SP
RR RB211 (B747) Group 21
Rolls Royce RB211 installed in Boeing 747-400 RR RB211 (B747-400) Group 21
Rolls Royce RB211 installed in Boeing 757-200 RR RB211-535 Series (B757) Group 21
Rolls Royce RB211 installed in Boeing 767 RR RB211 (B767) Group 21
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 5 of 22
Engineer Licences – Category Engine
Table 1 - Piston Engines and Gas Turbine Engines in Aeroplanes and Airships Classified
as Group 21 and Form of Licence Endorsement
ENGINE TYPE LICENCE ENDORSEMENT
Rolls Royce Spey RR Spey Series Group 21
Rolls Royce Tay installed in Grumman G-IV RR Tay (G-IV) Group 21
Rolls Royce Tay installed in Fokker F28-MK100 RR Tay (F28-MK100) Group 21
Rolls Royce/Packard Merlin (see note 1) RR/Packard Merlin Series Group 21
Rolls Royce AE 3007 C (except EMB 135/145) RR AE 3007 C Group 21
Rolls Royce AE 3007 C installed in Embraer
135/145
RR AE3007 (EMB 135/145) Group 21
RR Trent 700 installed in A330 RR Trent 700 (A330) GRP 21
Rolls Royce Trent 900 installed in A380 RR Trent 900 (A380) Group 21
Walter M601 Walter M601 Group 21
Williams Rolls FJ44 WR FJ44 Series Group 21
Wright R1820 and WSK PZL (Kalisz) Asz 62IR-
M18 (see note 1)
Wright R1820 Series Group 21
Wright R 2600 (see note 1) Wright R2600 Series Group 21
Wright R3350 (see note 1) Wright R3350 Series Group 21
Note 1: Refer to Section 6 titled Examination Requirements. In particular, please note the
information under the heading Mandatory training Course – Group 21 and 22.
Note 2: Currently, for licensing purposes, all the Garrett (AlliedSignal) TPE 331 dash models
are classified as a single series rating. This classification has been reviewed, and it is
considered that there are sufficient differences between the TPE 331-14 dash model and the
remainder of the TPE 331 dash models (below -14) to warrant them being separated into two
separate ratings. These new ratings will be endorsed on AME licences as follows: Garrett TPE
331 series to -13 (The series to -13 includes pre-Century engines) and Garrett TPE 331-14.
Holders of Garrett TPE 331 Series rating will be required to provide evidence of experience
and training to determine how their licence endorsements will be amended. Typically, a
LAME who has not had training on the TPE 331-14 will only be granted the series to TPE 331
Series to -13 rating. Conversely, LAMEs who can only provide evidence of training experience
on the TPE 331-14 will only be granted the TPE 331-14. To be granted both ratings a LAME
will have to provide evidence of training and experience on both.
The upgrading of the Garrett TPE 331 licence endorsements will occur at the next licence
renewal with no additional charge to the LAME beyond the licence renewal fee. At this time,
LAMEs will be required to substantiate their claim to either/both endorsements as applicable.
Should any LAME require to have their licence upgraded before the licence expiry date, an
additional charge for entering the endorsement(s) will be incurred. Once again, substantiation
for either or both of the endorsements will be required before entry upon the licence.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 6 of 22
Engineer Licences – Category Engine
Table 1 continued Notes - Piston Engines and Gas Turbine Engines in Aeroplanes and
Airships Classified as Group 21
In the interim period where Garrett TPE 331 licences have not been upgraded, Garrett TPE
331 rated LAMEs should be aware that they must not certify for maintenance on Garrett TPE
331 series to -13 models OR TPE 331-14 models, as applicable, unless they have had
approved training and experience.
Note 3: The GE CF34 Series Group 21 rating has been superseded by two new ratings. The
GE CF34 Series rating issued on existing AME licences will be removed and replaced with the
GE CF34-3 (CL600-Series) Group 21 rating allowing certification of maintenance on the GE
CF34-3 fitted to the CL600-Series aircraft only. To obtain the GE CF34-3 (CRJ 100/200)
Group 21 rating, the applicant must complete appropriate approved training.
Note 4: Group 21 ratings for PW4000 (B747-400) and PW4000 (B767) may be granted on the
basis of adequate experience gained on the PW4000 in one of these aircraft provided the
applicant holds an engine rating for the other aircraft type and all other criteria including
differences training are met. For example an applicant who holds an RR RB211 (B747-400)
rating may be granted both PW4000 (B767) and PW4000 (B747-400) ratings on the basis of
adequate experience gained on the PW4000 installed in the B767 only with no experience on
this engine in the B747-400.
Note 5: CFM 56 (B737) Group 21 Ratings With the introduction of the B737-NG aircraft into
Australian operations there is a need to clearly indicate the privileges of the Engine Group 21
CFM56 ratings. Therefore, two changes have occurred: the old CFM 56 Series (B737) rating
has been changed to read CFM 56 (B737-300/400). This rating will cover the CFM 56 engine
installed in B737-300/400 aircraft only. A new rating CFM 56 (B737-6/7/8/900) has also been
introduced. This rating will cover the FADEC controlled CFM56-7B in the B737-NG series of
aircraft only.
Licences containing the old rating will be changed at the next renewal or re-issue to reflect the
change to that rating. Please Note: There is NO change to the privileges of this rating.
A person who holds CFM 56 Series (B737) rating, now identified as CFM 56 (B737- 300/400)
will need to complete a CASA approved course listed in AAC 9-4 or 9-5 and complete an SOE
covering the CFM56 engine and the B737-600/700/800/900 installation to be granted the
CFM 56 (B737-6/7/8/900) rating. Details of this training and SOE requirements will be
developed when required. Similarly, a person who holds the CFM 56 (B737-6/7/8/900 will
need to complete a CASA approved course listed in AAC 9-4 or 9-5 and complete an SOE
covering the CFM 56 engine and the B737-300/400 installation to be granted the CFM 56
(B737-300/400). Details of this training and SOE requirements will be developed when
required.
Note 6: The –400 (910K) refers to the B747-438 aircraft fitted with the auxiliary fuel tank in
the forward cargo compartment and introduced into the Qantas fleet late 2002. This aircraft
has other modifications that have allowed the aircraft to operate at a higher MTOW of
910,000 lbs.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 7 of 22
Engineer Licences – Category Engine
Table 2 - Piston Engines and Gas Turbine Engines in Helicopters Classified as Group 22
and Form of Licence Endorsement
ENGINE TYPE LICENCE ENDORSEMENT
Allison/Rolls Royce 250-C Allison 250-C Series Group 22
Avco Lycoming T53 Lycoming T53 Series Group 22
Avco Lycoming T55 Avco Lycoming T55
Avco Lycoming LTS 101 Lycoming LTS 101 Series Group 22
General Electric CT58 GE CT58 Series Group 22
General Electric CT7 GE CT7 Series Group 22
Pratt & Whitney (Canada) PT6T P&W (C) PT6T Series Group 22
Pratt & Whitney (Canada) PT6B & PT6C P&W (C) PT6B/C Series Group 22
Pratt & Whitney (Canada) PW206& PW207 P&W (C) PW 200 Series Group 22
Turbomeca Arriel T/Meca Arriel Series Group 22
Turbomecca Arrius T/Meca Arrius Series Group 22
Turbomeca Artouste T/Meca Artouste Series Group 22
Turbomeca Astazou T/Meca Astazou Series Group 22
Turbomeca Turmo T/Meca Turmo Series Group 22
Turbomeca Makila T/Meca Makila Series Group 22
There are no piston engines fitted in helicopters on the Australian Civil Aircraft Register
classified Group 22.
5. Experience Requirements for the Grant of a Licence or
Endorsement of a Rating
The minimum experience time period required for the grant of a licence is four years aircraft
maintenance or aircraft component maintenance. The four years maintenance experience
includes two years aircraft maintenance experience in the category being applied for.
In addition to the four general and two years category experience, the applicant also needs to
have satisfied the Schedule of Experience (SOE) requirements for the Group being applied for.
The minimum practical experience required for the grant of a licence or the endorsement of an
additional rating is specified as follows:
(a) For engines classified as Group 21/22 the minimum practical experience is specified
within this AAC (Table 2) and available on the CASA website titled “Schedule Of
Experience Engine 21, 22. Minimum practical experience requirements may also be
specified within an approved Accelerated Training or Practical Consolidation
Training (PCT) Program.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 8 of 22
Engineer Licences – Category Engine
(b) For engines/systems classified Groups 1, 2 and 3 the minimum practical experience is
specified within this AAC (Table 4) and in a document published by CASA titled
“Schedule Of Experience Engine 1, 2, 3”.
If the information within the AAC is found to conflict with that provided within SOE documents
then the AAC is to be taken as the authoritive document. The experience reductions detailed
within the tables are only a guide to the assessing AWI. If the complexity of an aircraft or
aircraft group being used as the basis for a reduction is not comparable to the aircraft or aircraft
group being sought, then the AWI may vary the experience reduction applied accordingly.
Because of these uncertainties LAME’s are encouraged to have their particular situation assessed
by an AWI prior to compiling their SOE.
Only central office AWI may assess SOE reductions applicable to:
(a) Competency Technical Category applicants (overseas & current/discharged military
personnel who have been employed as aircraft engineers);
(b) accelerated training program applicants; and
(c) practical consolidated training applicants.
When determining the minimum hours an individual will require for Groups 21/22 SOE,
reference is to be made to Tables 1 and 2. Table 1 titled “Schedule Of Experience Complexity
Comparison For Groups 21/22", lists engine types which are considered to be of similar
complexity. Applicants should first consult this table to establish which “List” includes the
engine for which they seek a rating. Following this, applicants should consult Table 2 titled
“Engine Base Hours Requirement”. The appropriate hours in Table 2 are then transcribed into
the Schedule of Experience (SOE). For the grant of an additional Group 21/22 Type rating, the
minimum hours set out in Table 2 may be reduced. Refer to Table 3 titled “Rating Reduction” to
identify the reduction that may be claimed.
When determining the minimum hours an applicant will require for Groups 1, 2 and 3 engine
ratings, reference is to be made to Tables 4 and 5. Table 4 provides applicants the base hours
required and Table 5 provides applicants with reductions that may be applicable to their own
situation.However, it should be noted that the final decision to grant a reduction rests with the
airworthiness inspector at the time of processing the licence application.
Experience Requirements - B737-300/400, B737-600/700/800/900, CFM56 (B737-3/400) and
CFM56 (B737-6/7/8/900)
There are many similarities and many differences between the B737–300/400 and the B737–
6/7/8/900 aircraft and associated engines. These raise questions related to the information set
out in the AACs concerning SOE requirements. This document is intended to answer those
questions and provide guidance to CASA AWIs assessing rating applications. Maintenance
Personnel Licensing (MPL) Section provides the following comments and recommendations.
The total of the recommended minimum hours in the nominated ATA Chapters in the tables
below are not equal to the minimum recommended hours for the category. This is deliberate.
The difference in hours can be made up with experience in any applicable ATA Chapter
provided the minimum hours and emphasis in the nominated Chapters are met.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 9 of 22
Engineer Licences – Category Engine
Holders of ratings for both airframes/engines seeking ratings for other types:
The differences between these aircraft and engines allow some additional reduction in SOE
requirements in the airframe and engine category for an applicant for another rating, e.g. B747-
400 or RR RB211(B747-400), but the similarities do not allow 25% reduction for each rating.
The following recommendations are in addition to the reductions available by virtue of other
ratings up to a maximum reduction of 75%.
MPL recommends that a total of 35% reduction be allowed to holders of both the B737-300/400
and the B737-600/700/800/900.
MPL recommends that a total of 35% reduction be allowed to holders of both the CFM56
(B737-3/400) and CFM56 (B737-6/7/8/900).
For an applicant who does NOT hold a rating for the B737-300/400 or CFM56 the minimum
recommended SOE Hours are as per AAC Reduction Tables.
Airframe and Engine SOE Requirements for the holder of both the B737-600/700/800/900
and CFM-56 (B737-600/700/800/900) ratings
For an applicant who holds both B737-300/400 Airframe and CFM-56 (B737-300/400) Engine
ratings the minimum recommended SOE hours is 150 hours covering both categories, with
minimum hours in each ATA Chapter as set out in the following tables. The difference in hours
between the minimum required in the nominated ATA Chapters and the minimum required for
the both Categories can be made up by tasks in any applicable ATA Chapter provided the
minimum hours and emphasis in the nominated Chapters are met.
Airframe SOE Requirements for the holder of a B737-600/700/800/900 airframe rating
The Minimum recommended SOE hours is 120 hours with the minimum hours in each ATA
Chapter as set out in the following table.
ATA
Chapter
Base
Hours
Reduced
Hours
Comment/Emphasis
6-10 5 Nil
21 60 Nil or 15 See Note 4 below
25 40 10
26 5 Nil
27 90 15 Leading edge and trailing edge flap and rudder systems
28 40 10 See Note 5 below
29 50 10
30 20 Nil
32 80 15 Brakes
35 5 Nil
36 10 Nil
38 10 AAC New (vacuum) system
49 10 AAC New APU
52 & 56 50 10 Over-wing emergency doors
53 & 57 50 Nil
55 10 Nil
Total Hours Required Min 120 hours If B737-300/400 only rating held.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 10 of 22
Engineer Licences – Category Engine
Note 1: This recommendation takes into account previous experience and therefore supersedes
the normal SOE reductions set out in AAC 9-91, unless specified in the table.
Note 2: A minimum of 120 hours total is recommended due to the changes in system philosophy
by the increased use of computer control and monitoring, therefore the experience recorded
should include use of CDU and BITE to test/troubleshoot/confirm system operation.
Note 3: If the applicant also holds a rating for A320, B767, B747-400 or aircraft with similar
technology - SOE requirements can be reduced to minimum hours for each ATA Chapter listed
below.
Note 4: Experience required in ATA Chapter 21 – Airconditioning: Nil hours if trained and
experienced on both -300 and -400 airconditioning systems; or 15 hours if trained and
experience on –300 only with an emphasis on -400/800/900 zone temp control system and water
separator system. This experience may be gained on –400 aircraft.
Note 5: If applicant’s experience is on BBJ - Add 5 hours for BBJ auxiliary fuel tank system.
Note 6: The difference in hours between the minimum required in the nominated ATA Chapters
and the minimum required for the Airframe Category can be made up by tasks in any applicable
ATA Chapter provided the minimum hours and emphasis in the nominated Chapters are met.
Engine SOE Requirements for CFM-56 (B737-600/700/800/900)
For an applicant who holds CFM-56 (B737-300/400) Engine rating the minimum recommended
SOE hours is 75 hours, with minimum hours in each ATA Chapter as set out in the following
table.
ATA
Chapter
Base
Hours
Reduced
Hours
Comment/Emphasis
26 10 Nil
36 10 Nil
49 50 New APU – See Note 4 below
71&72 150 20 See Note 5 below
73 50 10 See Note 5 below
74 10 Nil
75 10 5 See Note 5 below
76 15 5 See Note 5 below
78 50 10 See Note 5 below
79 10 Nil
80 10 Nil
Total Hours Required Min 75 hours If CFM-56 (B737-300/400) only rating held.
Note 1: This recommendation takes into account previous experience and therefore supersedes
the normal SOE reductions set out in AAC 9-92, unless specified in the table.
Note 2: A minimum of 75 hours total is recommended due to the changes in system philosophy
by the increased use of computer control and monitoring, therefore the experience recorded
should include use of CDU and BITE to test/troubleshoot/confirm system operation.
Note 3: If the applicant also holds an engine rating for A320, B767, B747-400 or aircraft with
similar technology - SOE requirements can be reduced to minimum hours for each ATA
Chapter listed.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 11 of 22
Engineer Licences – Category Engine
Note 4: The lesser of 25 hours or as per AAC 9-92.
Note 5: Emphasis should be on: engine installation; fan maintenance; engine ground running;
operational/functional testing; and troubleshooting.
Note 6: The difference in hours between the minimum required in the nominated ATA Chapters
and the minimum required for the Engine Category can be made up by tasks in any applicable
ATA Chapter provided the minimum hours and emphasis in the nominated Chapters are met.
For further information concerning these recommendations, contact Maintenance Personnel
Licensing on 131 757 or ame.licensing@casa.gov.au.
Section 5 - Table 1 - Schedule of Experience Complexity Comparison for Group 21/22
Piston Engines Turbo Shaft Engines Turbo Prop Engines Turbo Fan/Jet Engines
Bristol
Centaurus
Allison 250-C Allison 250-B Honeywell AS 907 (CL300)
P & W
R1830/R2000
GE CT58 Allison 501-D13 BMW/Rolls Royce BR710
(GV-SP/G500/G550)
P & W R2800 GE CT7 Garrett TPE 331 BMW/Rolls Royce BR710
(BD-700)
RR/Packard
Merlin
Lycoming LTS
101
GE CT7 BMW/Rolls Royce BR715
(B717)
Wright R1820 Lycoming T53 Lycoming LTP 101 B/S Viper
Wright R2600 P & W (C) PT6B P&W (C) PT6A CFM 56 (A319/320/321)
P & W (C) PT6T P&W (C) PW100 CFM 56 (B737-300/400)
T/Meca Arriel P&W (C) PW100
(ATR42-400/500)
CFM 56 (B737-600/700/800/900)
T/Meca Artouste P&W (C) PW150
(DHC-8-400)
Garrett TFE731
T/Meca Astazou RR Dart GE CF34 (CL600/601)
T/Meca Makila Walter M601 GE CF34 (CRJ 100/200)
T/Meca Turmo GE CF34-10 (ERJ 170)
T/Meca Arrius GE CF6 (A300-B4/600/A310)
GE CF6 (B747-400)
GE CF6 (B767)
GE CJ610/CF700
GE 90 (B777-200/300)
IAE V2500 (A319/320/321)
Lycoming ALF502/LF507
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 12 of 22
Engineer Licences – Category Engine
Section 5 - Table 1 - Schedule of Experience Complexity Comparison for Group 21/22
Piston Engines Turbo Shaft Engines Turbo Prop Engines Turbo Fan/Jet Engines
P&W (C) JT15D
P&W (C) 308
P&W (C) PW305
P&W JT3D (B707)
P&W JT8D (B727)
P&W JT8D (DC9-30)
P&W JT8D (DC9-81/82/83)
P&W JT8D Ser (B737)
P&W JT9D (B747)
P&W JT9D (B767)
P&W PW4000
(A300-600/A310)
P&W PW4000 (A330)
P&W PW4000 (B747-400)
P&W PW4000 (B767)
RR AE 3007C
RR AE 3007 (EMB 135/145)
RR RB211 (B747)
RR RB211 (B747-400)
RR RB211 (B757)
RR RB211 (B767)
RR Spey
RR Tay
RR Trent 900 (A380)
Williams Rolls FJ44
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 13 of 22
Engineer Licences – Category Engine
Section 5 - Table 2 - Engine Base Hours Requirement
ATA
Chapter
Area
Piston
Engines
Turbo Shaft
Engines
Turbo Prop
Engines
Turbo Fan/Jet
Engines
26 10 10 10 10
36 -- 10 * 10 * 10 *
49 -- -- 50 ** 50 **
61 50 -- 50 --
71 & 72 150 150 150 150
73 50 50 50 50
74 45 10 10 10
75 -- 10 10 10
76 15 15 15 15
78 20 5 5 50 ***
79 10 10 10 10
80 10 10 10 10
82 -- -- 10 10 Note 4
* Denotes total hours applicable to engine or airframe category.
** Denotes if already holding the airframe rating to which this APU is fitted, reduce by 10
hours.
*** Denotes total hours applicable to engine fitted with thrust reverser system may be reduced
by 25 hours, if a rating is held for an engine type with a similar thrust reverser. Total hours
applicable to Turbo Fan/Jet Engines without thrust reverser systems will be 5 hours.
Note 2: No more than 50% of any ATA chapter area requirement specified in this AAC can be
met by the inclusion in the SOE of checks/inspections carried out as a result of ATA 5-20 or
ATA 5-50.
Note 3: Relevant maintenance simulator training, limited to 20% of the total hours in any task
area, may be accepted as appropriate experience. If a reduced requirement has already been
applied, then only 10% of the total hours for any task area would be allowed.
Note 4: Engine Running simulator training is acceptable for 100% SOE requirement.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 14 of 22
Engineer Licences – Category Engine
Section 5 - Table 3 - Rating Reduction
This table denotes the percentage in the SOE base hour requirements applicable when applying
for a Group 21/22 engine rating.
Seeking Engine Type Ratings Reduction
Piston Engines 1st piston engine type rating
2nd piston engine type rating
3rd piston engine type rating
4th & subsequent piston engine type rating
Nil
25%
50%
75%
Gas Turbine
Engines
1st gas turbine engine type rating
2nd gas turbine engine type rating
3rd gas turbine engine type rating
4th & subsequent gas turbine engine type rating
Nil
25%
50%
75%
Note 1: The above table represents the general reductions that may be claimed by applicants
applying for piston or gas turbine engine ratings. This table is not designed to account for the
“ifs, buts and what abouts”. If a person believes that they should have a different reduction to
that normally available via the table, then the person must refer to paragraph 3.10 of the
Schedule of Experience and make representation accordingly.
Note 2: Paragraph 3.10 of the Schedule of Experience provides for SOE reduction if an
applicant believes that the hours for a particular ATA chapter represents an onerous task.
Onerous tasks include those that cannot be easily satisfied due to inherent reliability of
systems and equipment; and those that the applicant believe they have already satisfied via
experience on systems and equipment which are closely allied to those being applied for. A
claim for a reduced experience requirement (beyond that provided by Table 3) may also be
based on the evidence provided by previously submitted SOE. Any application for a reduction
in SOE requirements should be submitted as soon as possible after obtaining the SOE.
Note 3: Where an engine is of the same basic type but installed in different aircraft, they will
be treated as one (1) rating for the purposes of the Rating Reduction Table 3.
Note 4: The holder of an Engine licence rated Groups 1 and 3 who applies for a Group 21
Piston Engine rating may be granted a 20% reduction from the hours required in Table 2. This
reduction is in addition to the reduction specified in this table to a maximum of 75%.
Note 5: The Maximum reduction in SOE base hours is 75% unless specifically stated.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 15 of 22
Engineer Licences – Category Engine
Section 5 - Table 4 – Lower Groups Engine Base Hours Requirement
Group Experience Task Area Full Hours
Group 1
Piston Engines and
Associated Engine
systems in Aeroplanes
and Airships excluding
those classified in
Groups 21 and 3
Scheduled Maintenance
Engine Installation
Fuel Metering & Control (Carburettor System)
Fuel Metering & Control (Injection System))
Ignition and Starting Systems
Propeller and Propeller Control
Electrical Systems
Instrument Systems (include 4 compass
calibrations)
Engine Run/Adjustment (must include operation
parameter checks)
Mechanical Maintenance
250 hours
40 hours
50 hours
50 hours
45 hours
30 hours
25 hours
25 hours
15 runs
75 hours
Group 2
Piston Engines and
Associated Engine
systems in Helicopters
excluding those
classified in Groups 22
and 3
Scheduled Maintenance
Engine Installation
Fuel Metering & Control (Carburettor System)
Fuel Metering & Control (Injection System)
Ignition and Starting Systems
Electrical Systems
Instrument Systems (include 4 compass
calibrations)
Mechanical Maintenance
250 hours
40 hours
50 hours
50 hours
45 hours
25 hours
25 hours
75 hours
Group 3
Supercharging Systems
Supercharging Systems
100 hours
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 16 of 22
Engineer Licences – Category Engine
Section 5 - Table 5 – Lower Groups Engine Rating Reductions
This table denotes the percentage reductions in the SOE base hours requirement, which is
applicable when applying for a lower Engine Group rating.
Rating Held Group Experience Sought
1 2 3
Engines Group 1 80%
Engines Group 2 80% (#3)
Piston Engine
Classified Group
21
80% 70% 50%
Piston Engine
Classified Group
22
70% (#3) 80% 50%
Any Electrical (#1) (#1)
Any Instrument (#2) (#2)
Note 1: Holders of an electrical rating do not need any experience in the electrical systems
task area.
Note 2: Holders of an instrument rating do not need any experience in the instrument systems
task area.
Note 3: No reduction is permitted for the Engine run/adjustment Task area requirement.
Note 4: Relevant maintenance simulator training, limited to 20% of the total hours in any task
area, may be accepted as appropriate experience. If a reduced requirement has already been
applied then only 10% of the total hours for any task area would be allowed.
Note 5: Experience gained during construction of an aircraft is not acceptable for SOE
purposes.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 17 of 22
Engineer Licences – Category Engine
Section 5 - Table 6 - Rating Reduction-Holder of Group 20 Electrical and
Instrument Categories converting to an initial Group21/22 Engine for a given
Type Rating
This table denotes the percentage reduction in the SOE base hours requirement
ATA
Chapter
Topic Area Reduction available Focus for Remaining
SOE
26 Fire Protect Systems 50% Fire bottles
36 Pneumatic System 25% Mechanical aspects
49 APU 10 Hours Mechanical aspects
61 Propeller & Governor 0%
71&72 Power Plant & Engine
General
0%
73 Engine Fuel & Control 10%
50%
Non FADEC-Mechanical
aspects
FADEC- Mechanical
aspects
74 Ignition & Starting
System
50% Mechanical aspects
75 Air Systems & Control 50% Mechanical aspects
76 Engine Controls 10%
50%
Non FADEC Mechanical
aspects
FADEC-Mechanical
aspects
78 Thrust Reverser 25% Mechanical aspects
79 Oil 0% Mechanical aspects
80 Starting 0%
81 Turbines
(Superchargers)
0%
82 Water injection 0%
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 18 of 22
Engineer Licences – Category Engine
Acceptance of Experience for Engine Rating Gained on Another Aircraft Type
Group 21 or Group 22 specific engine type ratings allow a LAME to be part of the airworthiness
control system for an engine and the associated systems in an aircraft, not just the bare engine.
Therefore, CASA needs to be satisfied that the applicant has adequate experience with the
layout, location, operation and other aspects of maintaining the engine in the related aircraft type
prior to granting a rating. Some of these ratings only apply to a particular aircraft type, e.g. RR
GE CF34-3(CL601/604)
However, CASA recognises that many tasks are identical on an engine type irrespective of the
airframe in which a particular engine is installed, therefore some experience gained on one
installation is acceptable towards a rating for the same engine in another installation.
The following table provides guidance to minimum experience in each ATA Chapter in the SOE
that must be gained by performing maintenance on the engine type installed in correct airframe.
“Correct” in this context means the airframe identified in the rating applied for. Other
experience may be accepted when gained on the engine type installed in another aircraft
type/model from the same manufacturer. Experience gained on the engine type installed in an
airframe for another manufacturer will need to be assessed on a case-by-case basis following a
request from an applicant.
These minimum hours are applicable after the normal reductions (As per AAC 9-92) on the basis
of ratings already held are applied. These minimum hours may be further reduced if the
applicant holds a rating for an engine in the airframe to which the application applies.
The maintenance performed on the correct aircraft must include the areas of emphasis shown in
the table.
Identical Tasks. Identical tasks are those that involve the same parts, tools, processes and skills
as the same task on the same engine type in another airframe type. As an example the removal
and replacement of an oil filter would be identical although access may be by opening as access
panel on one aircraft and opening the cowls on another. However, a functional test of the
ignition system would not be identical since the controls, circuit breakers and procedures will
differ in some ways between the different aircraft. Similarly, the removal and installation of an
oil filter locked by lockwire can be considered identical to that locked by a splitpin, however,
dry motoring the engine to check for leaks is not identical.
The applicant is responsible to demonstrate that tasks are identical and clearly identify all tasks
performed on another aircraft type in the SOE. If tasks are not demonstrated to be identical or
are not clearly identified as performed on another aircraft type – the tasks and SOE may be
rejected.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 19 of 22
Engineer Licences – Category Engine
Section 5 - Table 7 - Acceptance of Experience for Engine Rating Gained on Another
Aircraft Type
ATA
Chapter
Base
Hours
Mandatory
hours on
“correct”
aircraft type
Emphasis on
“correct” aircraft
type
Considerations
26 10 10 Airframe rating held
36 10 10 Airframe rating held
49 50 50 – if
different APU
49 50 5 – If same APU APU operation,
APU engine to
aircraft interface &
differences
Control & indicating
systems
71 &72 150 75 Engine run Engine
to aircraft interface
& differences
Indicating system
Engine mounts, cowls,
drains, connections to
the airframe.
73 50 10 Control system –
FADEC Indicating
system
74 10 5 Control & indicating
systems
75 10 5 Engine to aircraft
interface &
differences
Control system –
FADEC Indicating
system
76 10 8 Engine to aircraft
interface &
differences
Control systems –
FADEC Indicating
system
78 50 25 if different
reverser
Engine to aircraft
interface &
differences
Control systems –
FADEC Indicating
system
78 50 10 if same reverser Engine to aircraft
interface &
differences
Control systems –
FADEC Indicating
system
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 20 of 22
Engineer Licences – Category Engine
ATA
Chapter
Base
Hours
Mandatory
hours on
“correct”
aircraft type
Emphasis on
“correct” aircraft
type
Considerations
79 10 2 Heat exchangers
Indicating system
80 10 2 Control & indicating
systems
“Considerations” are aspects that may require consideration of possible variation of these
reductions due to installation features. These are not exhaustive; other factors may also need to
be considered.
Reductions may be granted on the basis of the AAC Part 9-92, however the minimum hours/
proportion on the correct type must be met.
Where one installation uses a hydromechanical control system and another full authority digital
engine controls (FADEC), all experience/tasks related to the control/monitoring/indication
aspects of the systems must be on the correct installation.
Where one installation has an MCDU or similar system used for maintenance purposes, all
experience related to functional/operational testing and troubleshooting aspects must be on the
correct installation.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 21 of 22
Engineer Licences – Category Engine
6. Examination Requirements
This section details the examinations required prior to the issue of a licence or the endorsement
of additional ratings.
Examination Code Licence Groups
1 2 3 21 22
Core Subjects
Airworthiness Administration AA * * * * *
Maintenance Practices and Materials BA * * * * *
Aerodynamics and Mechanical Controls BB * * * * *
Electrical and Instrument Systems BC * * * * *
Piston Engine Theory and Construction GA * * * # #
Piston Engine Systems GB * * * # #
Propellers GC * #
Gas Turbine Engine Theory and Construction GG # #
Gas Turbine Engine Systems GH # #
Specific Group Subjects
Aeroplane piston engine installation, operation and
maintenance
GD *
Helicopter piston engine installation, operation and
maintenance
GE *
Supercharging Systems GF * # #
Specific Type
Written GS # #
Oral GO # #
* Denotes the prerequisite examinations to be passed for each group or type.
# Denotes the examinations to be passed for Group 21 or Group 22 as applicable.
Note 1: A separate Specific Type (GS) examination is required for each additional rating in
Group 21 or Group 22.
Note 2: The written examination GS will only be available for Group 21 and 22 engines which
are not fitted to high capacity aircraft, should a mandatory training course, acceptable to the
Authority, as required in CAO 100.92 para 5.2 not be available.
Note 3: Where an engine in Group 21 or Group 22 is considered by the Authority to be
sufficiently similar to an engine for which a rating is held, GS becomes GO for the installation
and engine/airframe system differences.
Airworthiness Advisory Circular (AAC)
Administration and Procedure – Aircraft Maintenance Engineer
Licences – Category Engines
Part 9-92, Issue 28 –May 2012 Administration and Procedure – Aircraft Maintenance Page 22 of 22
Engineer Licences – Category Engine
Note 4: Applicants who hold a credit for examinations IA, IZ and EB will be granted a credit
for examination BC.
Note 5: A credit for examination QB may be granted to a person who holds credits for
examinations BA, BB and BC provided the credits for these examinations were obtained from
the full format examinations sat and passed after 1 January 1989.
Note 6: The specific type examination GS for gas turbine propulsion engines installed in
aircraft also fitted with either an Airesearch GTCP36- 300, GTCP- 331, GTCP-660 and
TSCP-700 series or a P&W (C) PW901A Auxiliary Power Unit will be supplemented with an
additional Part 3 examination covering the particular APU.
Note 7: A specific type oral examination GO is also required for each rating in Group 21 and
22 where the practical experience for that rating is gained within an approved Practical
Consolidation Training (PCT) Program.
Mandatory Training Courses - Groups 21 and 22
As specified in paragraph 5.2 of CAO Section 100.92 Issue 3 all applicants for engine ratings
classified Groups 21 and 22 and listed in Tables 1 and 2 of sub- section 4 of this AAC, are
required to have successfully completed a relevant training course acceptable to the Authority as
a prerequisite to gaining the rating.
For a variety of reasons courses and associated examinations may not be available to personnel
who are trying to gain a type course examination credit. CASA no longer allocates resources to
the maintenance, update or delivery of Group 21 and 22 Specific Type Examinations. Aircraft
type training is an activity that CASA believes should be commercially delivered.
Situations may arise where AME are unable to access type course training and associated
examination credit. AME so affected are encouraged to contact CASA so that the individual’s
particular circumstances can be reviewed.
7. Engine Ground Run Training
Guidelines for the development and conduct of engine ground run training are contained in AAC
Information Bulletin No 6 - CASA guidance Material for Engine Ground Run Training, which
can be found at www.casa.gov.au/airworth/aac
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