Page 1

Navigation Aids Flight Inspection Webinar(24 - 25 November 2020)

Information Paper:

Strategy for NAV-AIDs ValidationDuring Covid19 Pandemic

Presented by Islamic Republic of Iran’s ANSP

Moddareszadeh@airport.ir

Page 2Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

Content

INTRODUCTION

DISCUSSION

MEASURMENTS

CONCLUSIONS

Page 3Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION,DISCUSSON,MEASURMENTS,CONCLUSIONS

Issues During Covid19 Pandemic:Probability of getting sick for flight crew and electronic

personnel.Decreasing in civil flights. Issues related to flight inspection aircraft. Increasing NAVAIDs expiration and IR of IRAN has over 250 NAVAIDs and many of them

encountered to expiration.

Page 4Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

Safety management office in

IAC was responsible to

conduct meetings and

gathering information to

assess possibility of any

action.

Page 5Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

CNS Department specified the

parameters that secure reliability

and stability of NAVAIDs then

graded and listed.

Air traffic control department

graded the flight plans with regard

of terrain and restrictions.

Page 6Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

After two months discussion, the program

submitted to CAO and it adopted. Iran

CAO admitted exemption of CAD 4410,

Items 6-1 and 6-3 that permitting NAVAIDs

validity duration increased up to 100%

from expiration date.

All documents and verifications had to

report every 15 days.

Page 7Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

Example in Doc. 8071 – Volume 1 – 1.15

Page 8Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

Why a NAV-AID become out of service?

Malfunction or Technical issues

FLCK expiration

Is it reasonable that we put this system out of service?

Page 9Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

First step:

The NAVAIDs which were expired,

addressed for assessment in terms of :

STABILITY

MAINTENANCE QUALITY

AGE OF SYSTEM

REDUNDANCY

TEST INSTRUMENT

TECHNOLOGY

OPERATION

Page 10Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

NAV-AIDs Reliability Assessment

Parameters Low Risk Medium Risk High Risk

StabilityNo changes in 3 previous flight

inspection

No changes in critical parameters

in 3 previous flight inspection

Changes in critical parameters in

3 previous flight inspection

Maintenance QualityPresence of trained and adequate

NAV maintenance in every shift

work

Presence of CNS maintenance in

every shift workNav. Maintenance Staff shortage

Age of System Less than 15 years15-22 years with acceptable

resumeOver 22 years

Redundancy Both TX Normal Single transmitterSingle and not too much

consistence transmitter

Test Instruments Dedicated test instrument Undedicated test instrument N/A

Technology- ILS 2 frequency

- DVOR

- VOR used for en-route

- ILS single frequency

- VOR used for terminalN/A

Operation- Glide angle less than 3.5°

- The airport categorized at A*- The airport categorized at B*

- Glide angle more than 3.5°

- The airport categorized at C*

* Categorize is according to OM of IR IRAN Air Line.

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

Page 11Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

NAV-AIDs Assessment Form

How did these parameters evaluate?

Page 12Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

NAV-AIDs Nominal Interval Extension

RISKExtend Nominal Extension Up to (Month)

ILS/DME VOR/DME DVOR/DME

LOW 6 12 18

MEDIUM 4 7 10

HIGH 45(Days) 3 4

Page 13Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

Acceptable ground check which

demonstrates NAVAID has sufficient

accuracy.

No changes in environment should be

verified in ground check form.

Confirmation by three arrival flights about

NAVAID/NAVAIDs operation in approach and

landing phase of flight.

Other condition :

Page 14Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

All measurements were based on :

Knowledge Experience DocumentsFactory

Recommendation

Page 15Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

In full compliance with safety consideration the following results

have achieved:

1. It helped breaking the chain of outbreak

and save personnel.

2. The validity of over 100 NAVAIDs

system which were involve of the

program are extended up to twice.

Page 16Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

In full compliance with safety consideration the following results

have achieved:

3. Work load of flight inspection office

decreased.

2. time and costs saved as well.

INTRODUCTION-DISCUSSON-MEASURMENTS-CONCLUSIONS

Page 17Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

Future Plan

Using Unmanned aerial Vehicle (UAV) Drone (Ref Doc.8071-V1 , 1.18)

We are going to use drone with additional test equipment

because:

1- Easy to conduct.

2- Cost effective.

3- Some terrain influence into signal in

space.

4- More accurate and more reliable with

regard to ground check.

Page 18Navigation Aids Flight Inspection Webinar

(24 - 25 November 2020)

Question??

Page 19