DOC AIRBUS | AMM A320FInspection of the Engine Fuel Tubes [IAE]
TASK 73-11-49-200-010-A
Inspection of the Engine Fuel Tubes
1. Reason for the Job
This TASK supplies the data for the inspection of the engine fuel tubes.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 73-11-49-941-053-A ** ON A/C NOT FOR ALL
Subtask 73-11-49-210-050-C ** ON A/C NOT FOR ALL
Subtask 73-11-49-410-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:00:15 UTC
Inspection of the Engine Fuel Tubes
1. Reason for the Job
This TASK supplies the data for the inspection of the engine fuel tubes.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-21-42-000-010-B | Removal of the Fuel-Cooled IDG Oil-Cooler |
| TASK 24-21-42-400-010-B | Installation of the Fuel-Cooled IDG Oil-Cooler |
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 31-60-00-860-001-A | EIS Start Procedure |
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-30-00-440-012-A | Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
| TASK 78-32-00-410-010-A | Closing of the Thrust Reverser Halves |
| TASK 79-21-43-000-010-B | Removal of the Fuel Cooled Oil Cooler |
| TASK 79-21-43-400-010-B | Installation of the Fuel Cooled Oil Cooler |
Tube - FCOC to PumpSubtask 73-11-49-941-053-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(3) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(4) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 73-11-49-860-055-A ** ON A/C NOT FOR ALL (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(3) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(4) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Aircraft Maintenance Configuration
(1) On ENG panel 115VU:
(Ref. AMM TASK 31-60-00-860-001).
(3) Make sure that, on the ENG fuel page, the LP valve is shown closed.
Subtask 73-11-49-865-060-A ** ON A/C NOT FOR ALL (1) On ENG panel 115VU:
- Make sure that the ENG/MASTER 1(2) control switch is set to the OFF position.
(Ref. AMM TASK 31-60-00-860-001).
(3) Make sure that, on the ENG fuel page, the LP valve is shown closed.
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 73-11-49-010-052-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 1000EM1 (ENGINE1) | |||
| 49VU | FUEL/LP VALVE/MOT1/ENG1 | 1QG | A08 |
| 121VU | FUEL/LP VALVE/MOT2/ENG1 | 3QG | M25 |
| FOR FIN: 1000EM2 (ENGINE2) | |||
| 49VU | FUEL/LP VALVE/MOT1/ENG2 | 2QG | A09 |
| 121VU | FUEL/LP VALVE/MOT2/ENG2 | 4QG | M26 |
D. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 73-11-49-040-050-A ** ON A/C NOT FOR ALL (1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
E. Deactivate the thrust reverser.
Subtask 73-11-49-010-053-A ** ON A/C NOT FOR ALL WARNING:
MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
(1) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012). F. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 73-11-49-210-050-C ** ON A/C NOT FOR ALL
A. Visually examine the engine fuel tubes for dents, nicks, fretting and scoring.
(1) Dents:
(a) Smooth dents of a large area relative to depth:
1 That does not decrease the diameter of the tube by more than 10 percent at one point, accept it.
2 That decrease the diameter of the tube by more than 10 percent at one point, reject it.
3 When they are not within one diameter or 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, accept it.
4 When they are within one diameter or 0.5 in. (12.7 mm), whichever is the greater, of the tube end fitting, reject it.
(b) Smooth dents of a small area up to 0.125 in.2 (80.6 mm2):
1 With a smooth bottom and not more than 0.015 in. (0.38 mm) or less in depth on the external surface of a bend, accept it.
2 When their depth is more than 0.015 in. (0.38 mm) on the external surface of a bend, reject it.
3 With a smooth bottom and not more than 0.025 in. (0.63 mm) or less in depth on other sections of the tube, accept it.
4 When their depth is more than 0.025 in. (0.63 mm) reject it.
5 When they are not within one diameter or 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, accept it.
6 When they are within one diameter or 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, reject it.
(c) Dents which are not smooth, reject them.
(2) Nicks:
(a) With a smooth bottom and not more than 0.004 in. (0.10 mm) in depth and all burrs have been removed, accept it.
(b) With a bottom that is not smooth or is more than 0.004 in. (0.10 mm) in depth, reject it.
(c) On the external surface of a bend, reject it.
(3) Fretting:
(a) All tube, except in (b)
1 Accept fretting up to maximum of 0.004 in. (0.1016 mm).
(b) Fuel tube FCOC to pump at clipping point CP0795.
1 Accept fretting up to 0.008 in. (0.2032 mm) only if SBE 73-0060 is incorporated.
(c) Reject tubes with fretting in excess of (a) and (b).
Subtask 73-11-49-210-052-A ** ON A/C NOT FOR ALL (1) Dents:
(a) Smooth dents of a large area relative to depth:
1 That does not decrease the diameter of the tube by more than 10 percent at one point, accept it.
2 That decrease the diameter of the tube by more than 10 percent at one point, reject it.
3 When they are not within one diameter or 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, accept it.
4 When they are within one diameter or 0.5 in. (12.7 mm), whichever is the greater, of the tube end fitting, reject it.
(b) Smooth dents of a small area up to 0.125 in.2 (80.6 mm2):
1 With a smooth bottom and not more than 0.015 in. (0.38 mm) or less in depth on the external surface of a bend, accept it.
2 When their depth is more than 0.015 in. (0.38 mm) on the external surface of a bend, reject it.
3 With a smooth bottom and not more than 0.025 in. (0.63 mm) or less in depth on other sections of the tube, accept it.
4 When their depth is more than 0.025 in. (0.63 mm) reject it.
5 When they are not within one diameter or 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, accept it.
6 When they are within one diameter or 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, reject it.
(c) Dents which are not smooth, reject them.
(2) Nicks:
(a) With a smooth bottom and not more than 0.004 in. (0.10 mm) in depth and all burrs have been removed, accept it.
(b) With a bottom that is not smooth or is more than 0.004 in. (0.10 mm) in depth, reject it.
(c) On the external surface of a bend, reject it.
(3) Fretting:
(a) All tube, except in (b)
1 Accept fretting up to maximum of 0.004 in. (0.1016 mm).
(b) Fuel tube FCOC to pump at clipping point CP0795.
1 Accept fretting up to 0.008 in. (0.2032 mm) only if SBE 73-0060 is incorporated.
(c) Reject tubes with fretting in excess of (a) and (b).
B. Visually Examine the Internal Housing Surface
(1) Wear on the housings (1), (2) and (3).
(a) Remove the housings (1) and (2) (Ref. AMM TASK 79-21-43-000-010).
(b) Remove the housing (3) (Ref. AMM TASK 24-21-42-000-010).
(2) Not more than 0.004 in. (0.10 mm) in depth, accept it.
(3) More than 0.004 in. (0.10 mm) in depth, reject it.
(4) Install the fuel tubes and the housings (1) and (2) (Ref. AMM TASK 79-21-43-400-010).
(5) Install the housing (3) (Ref. AMM TASK 24-21-42-400-010).
5. Close-up(1) Wear on the housings (1), (2) and (3).
(a) Remove the housings (1) and (2) (Ref. AMM TASK 79-21-43-000-010).
(b) Remove the housing (3) (Ref. AMM TASK 24-21-42-000-010).
(2) Not more than 0.004 in. (0.10 mm) in depth, accept it.
(3) More than 0.004 in. (0.10 mm) in depth, reject it.
(4) Install the fuel tubes and the housings (1) and (2) (Ref. AMM TASK 79-21-43-400-010).
(5) Install the housing (3) (Ref. AMM TASK 24-21-42-400-010).
Subtask 73-11-49-410-051-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the ground support equipment
(3) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 73-11-49-440-050-A ** ON A/C NOT FOR ALL Subtask 73-11-49-410-052-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the ground support equipment
(3) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
Subtask 73-11-49-865-061-A ** ON A/C NOT FOR ALL (1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 1000EM1 (ENGINE1) | |||
| 49VU | FUEL/LP VALVE/MOT1/ENG1 | 1QG | A08 |
| 121VU | FUEL/LP VALVE/MOT2/ENG1 | 3QG | M25 |
| FOR FIN: 1000EM2 (ENGINE2) | |||
| 49VU | FUEL/LP VALVE/MOT1/ENG2 | 2QG | A09 |
| 121VU | FUEL/LP VALVE/MOT2/ENG2 | 4QG | M26 |