DOC AIRBUS | AMM A320FInspection/Check of the Fuel Manifold [CFML]
TASK 73-21-35-200-801-A
Inspection/Check of the Fuel Manifold
Self explanatory
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 73-21-35-941-053-A
Subtask 73-21-35-210-051-A
Subtask 73-21-35-410-054-A
[Rev.10 from 2021]
2026.04.01 03:04:45 UTC
Inspection/Check of the Fuel Manifold
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-51-000-803-A | Removal of the Power Plant with 2D Bootstrap |
| TASK 71-00-51-400-803-A | Installation of the Power Plant with 2D Bootstrap |
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
| TASK 73-11-30-000-802-A | Removal of the Fuel Nozzles |
| TASK 73-11-30-400-802-A | Installation of the Fuel Nozzles |
| TASK 78-30-00-040-809-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-30-00-440-809-A | Reactivation of the Thrust Reverser System after Ground Maintenance |
| TASK 78-36-00-010-806-A | Opening of the Thrust Reverser Cowl Doors |
| TASK 78-36-00-410-806-A | Closing of the Thrust Reverser Cowl Doors |
Fuel ManifoldSubtask 73-21-35-941-053-A
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 73-21-35-010-056-A (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch
- The ENG/MASTER 1(2) control switch.
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 73-21-35-040-053-A (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 73-21-35-010-057-A WARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-809). D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
4. Procedure(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 73-21-35-210-051-A
A. General Visual Inspection (GVI) of the Fuel Manifold Tubes
(1) Visually examine the fuel manifold tubes:
(a) Cracks, splits or kinks in the fuel manifold tubes are not acceptable.
(b) Wrinkles in the bends of the fuel manifold tubes are acceptable with this limit:
1 The depth of the wrinkle must be less than 3 percent of the outside diameter of the tube.
(c) Dents in the fuel manifold tubes are acceptable with these limits:
1 Not more than one dent in 1.0 ft. (0.305 m) of the tube.
2 The depth of the dent must be less than 20 percent of the outside diameter of the tube.
3 The minimum radius of the dent must be greater than 0.070 in. (1.78 mm).
(d) Nicks, scratches, scores and chafed areas are acceptable with this limit:
1 The depth of the nick, scratch, score and chafed area must be less than 0.005 in. (0.13 mm) in depth after the tube is blended to a smooth radius.
(2) If you find damage to the fuel manifold that is not in the limits, then replace the engine (Ref. AMM TASK 71-00-51-000-803) and (Ref. AMM TASK 71-00-51-400-803), unless you are given other instructions.
Subtask 73-21-35-210-052-A (1) Visually examine the fuel manifold tubes:
(a) Cracks, splits or kinks in the fuel manifold tubes are not acceptable.
(b) Wrinkles in the bends of the fuel manifold tubes are acceptable with this limit:
1 The depth of the wrinkle must be less than 3 percent of the outside diameter of the tube.
(c) Dents in the fuel manifold tubes are acceptable with these limits:
1 Not more than one dent in 1.0 ft. (0.305 m) of the tube.
2 The depth of the dent must be less than 20 percent of the outside diameter of the tube.
3 The minimum radius of the dent must be greater than 0.070 in. (1.78 mm).
(d) Nicks, scratches, scores and chafed areas are acceptable with this limit:
1 The depth of the nick, scratch, score and chafed area must be less than 0.005 in. (0.13 mm) in depth after the tube is blended to a smooth radius.
(2) If you find damage to the fuel manifold that is not in the limits, then replace the engine (Ref. AMM TASK 71-00-51-000-803) and (Ref. AMM TASK 71-00-51-400-803), unless you are given other instructions.
NOTE: The fuel manifold is not a Line Replaceable Unit (LRU). To remove the fuel manifold, you must remove the engine.
B. GVI of the Fuel Nozzle Supply Tubes
(1) Examine the fuel nozzle supply tubes:
(a) Cracks, splits or kinks in the fuel nozzle supply tubes are not acceptable.
(b) Wrinkles in the bends of the fuel nozzle supply tubes are acceptable with this limit:
1 The depth of the wrinkle must be less than 3 percent of the outside diameter of the tube.
(c) Dents in the fuel nozzle supply tubes are acceptable with these limits:
1 Not more than one dent in each of the tubes.
2 The depth of the dent must be less than 10 percent of the outside diameter of the tube.
3 The minimum radius of the dent must be greater than 0.070 in. (1.78 mm).
(d) Flattened areas in the fuel nozzle supply tubes are acceptable with these limits:
1 The length of the flattened area must be less than 2 times the outside diameter of the tube.
2 The flattened area must change the contour of the tube by less than 10 percent of its outside diameter.
(e) Nicks, scratches, scores and chafed areas are acceptable with this limit:
1 The depth of the nick, scratch, score and chafed area must be less than 0.005 in. (0.13 mm) in depth after the tube is blended to a smooth radius.
(2) If you find damage to a fuel nozzle that is not in the limits, then replace the fuel nozzle (Ref. AMM TASK 73-11-30-000-802) and (Ref. AMM TASK 73-11-30-400-802).
5. Close-up(1) Examine the fuel nozzle supply tubes:
(a) Cracks, splits or kinks in the fuel nozzle supply tubes are not acceptable.
(b) Wrinkles in the bends of the fuel nozzle supply tubes are acceptable with this limit:
1 The depth of the wrinkle must be less than 3 percent of the outside diameter of the tube.
(c) Dents in the fuel nozzle supply tubes are acceptable with these limits:
1 Not more than one dent in each of the tubes.
2 The depth of the dent must be less than 10 percent of the outside diameter of the tube.
3 The minimum radius of the dent must be greater than 0.070 in. (1.78 mm).
(d) Flattened areas in the fuel nozzle supply tubes are acceptable with these limits:
1 The length of the flattened area must be less than 2 times the outside diameter of the tube.
2 The flattened area must change the contour of the tube by less than 10 percent of its outside diameter.
(e) Nicks, scratches, scores and chafed areas are acceptable with this limit:
1 The depth of the nick, scratch, score and chafed area must be less than 0.005 in. (0.13 mm) in depth after the tube is blended to a smooth radius.
(2) If you find damage to a fuel nozzle that is not in the limits, then replace the fuel nozzle (Ref. AMM TASK 73-11-30-000-802) and (Ref. AMM TASK 73-11-30-400-802).
Subtask 73-21-35-410-054-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
Subtask 73-21-35-440-052-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR
B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-809).
Subtask 73-21-35-410-055-A