ENGINE - OIL - PROVIDE A REROUTED NO.4 BEARING OIL SCAVENGE TUBE ASSEMBLY - 7 -MOD.ENG-79-0035

1. Planning Information

A. Effectivity

(1) Aircraft: (a) Airbus A320

(2) Engine: (a) V2500-A1 Engines prior to Serial No.V0326

B. Concurrent Requirements

Service Bulletin V2500-NAC-71-0145 requires to be incorporated concurrentlywith Service Bulletin V2500-ENG-79-0035.

C. Reason

(1) Condition

A foul condition can occur between the oil scavenge tube from the No.4bearing scavenge elbow to bifurcation panel and the left hand cowl doorfront hold open rod.

(2) Background

Not applicable

(3) Objective

To improve the clearance between the tube assembly and the hold open rodwhen the rod is in the stowed position.

(4) Substantiation

A trial assembly on a mock-up engine has demonstrated adequate clearancebetween the tube assembly and the hold open rod.

(5) Effect of Bulletin on Workshop Procedures:

Removal/Installation Affected (see Supplemental Information)Disassembly/Assembly Not affectedCleaning Not affectedInspection/Check Not affectedRepair Not affectedTesting Not affected

(6) Supplemental Information

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Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

The Removal/Installation will be revised to add the new configuration ofthis Service Bulletin.

D. Description

A modified oil scavenge tube assembly between the No.4 bearing and bifurcationpanel is introduced. The tube features four clipping lugs. One luge is used atnew clip point 6068, while the other three lugs support two firewire harnessclips and the support bracket for the firerail transponders.

Existing clip point 5222 is amended by introducing a longer bolt and spacer topermit the EBU firewire harness to be supported. The two washers previouslyfitted at this clip point are deleted.

E. Approval

The part number changes and/or part modifications described in Section 2 and 3of this Service Bulletin have been shown to comply with the applicable FederalAviation Regulations and are FAA-APPROVED for the Engine Model listed.

F. Compliance

Category Code 7

Accomplish when supply of superseded parts has been depleted.

G. Manpower

Estimated manhours to incorporate the full intent of this Bulletin:

Venue Estimated Manhours

(1) In Service Not applicable

(2) At Overhaul Not affected

H. Material - Price and Availability

(1) Modification Kit not required.

(2) See ’Material Information’ section for prices and availability of futurespares.

I. Tooling - Price and Availability

Special tools are not required.

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Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

J. Weight and Balance

(1) Weight change None

(2) Moment arm No effect

(3) Datum Engine front mount centerline(Power Plant Station (PPS) 100)

K. Electrical Load Data

This Service Bulletin has no effect on the aircraft electrical load.

L. References

(1) Internal Reference No.

EC92VR353

(2) Other References

Service Bulletin V2500-NAC-71-0145.

M. Other Publications Affected

(1) V2500 Engine Illustrated Parts Catalog (S-V2500-1IA), Chapter/Section73-22-49 and 79-22-49.

(2) V2500 Engine Manual (E-V2500-1IA), 72-00-40, Removal-04 andInstallation-07.

(3) V2500 Component Maintenance Manual (CMM-THD-V2500-1IA), 79-22-49,Cleaning-00 and -01, Inspection/Check-00 and -03.

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Location of No.4 bearing oil scavenge tube assemblyFig.1

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Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

Schematic view of No.4 bearing oil scavenge tube - Before alterationFig.2

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Schematic view of No.4 bearing oil scavenge tube - After alterationFig.3

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Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

Diagrammatic view on arrow A (see figures 2 and 3) showing location of end connectors- Before and after alteration

Fig.4

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Clipping point 5222 - Before and after alterationFig.5

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Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

New clipping pont 6068Fig.6

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2. Accomplishment Instructions

A. Rework Instructions

(1) There are no rework instructions necessary for this Service Bulletin.

B. Assembly Instructions

(1) Install 6A5367 oil tube. Refer to Figures 1, 3 and 4.

(2) Torque the nuts to 566 to 611 lbfin (64 to 69 Nm) and safety with CoMat02-126 lockwire at both ends.

(3) Install new clipping point 6068 to 6A5367 tube and 5R8141 tube using the4W0109 bolt, TA025022-12 clip, 5W1030 spacer and 4W0043 nut. Refer toFigures 3 and 6.

(4) Install revised clipping point 5222 using 4W0117 bolt, 5R8141 tube,existing spacer, 5A9043 tube, new AS62404 clip to 5A9059 tube, new 5W1031spacer and existing nut. Refer to Figures 3 and 5.

(5) Torque the nuts at clipping points 6068 and 5222 to 36 to 45 lbfin (4 to5 Nm).

C. Recording Instructions

(1) A record of accomplishment is necessary.

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Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

3. Material Information

Applicability: For each V2500 Engine to incorporate this Bulletin.

A. Kits associated with this Bulletin:

None

B. Parts affected by this Bulletin:

New Est’d OldPart No. Unit Part No. Instructions(ATA No.) Qty Price ($) Keyword (IPC No.) Disposition--------------------------------------------------------------------------------

AS62404 1 19.40 Clip ) 400WSS4 (A)(C)(73-22-49) ) (02-136)

)CP52224W0117 1 9.07 Bolt, bi-hex ) 4W0107 (A)(C)(79-22-49) ) (01-557)

)- 2 Washer ) 5W1086 (C)

(79-22-49) ) (01-558))

5W1031 1 10.80 Spacer ) - (A)(79-22-49) ) (01-563)

4W0109 1 4.00 Bolt, bi-hex ) - (A)(79-22-49) ) (01-565)

)TA025022-12 1 13.30 Clamp, loop ) - (A)(79-22-49) ) (01-568)

)CP60685W1030 1 10.80 Spacer ) - (A)(79-22-49) ) (01-570)

)4W0043 1 2.23 Nut ) - (A)(79-22-49) ) (01-572)

6A5367 1 756.00 Tube assy, oil scavenge - 5R8138 (A)(B)(79-22-49) No.4 bearing to (03-100)

bifurcation panel

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Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3).

C. Instructions/Disposition Code Statements:

(A) New parts currently available(B) Old parts no longer available(C) Old parts can be used up in other applications(S1) New part may be used in place of old part but not vice-versa.

NOTE: The estimated 1995 unit prices shown are provided for planningpurposes only and do not constitute a firm quotation. Consult theIAE Price Catalog or contact IAE’s Spare Parts Sales Department forinformation concerning firm prices.

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