W DOC AIRBUS | AMM A320F

Installation of the Return Fuel Lines [PW11]

TASK 73-11-48-400-803-A
Installation of the Return Fuel Lines

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.
WARNING: DO NOT LET THE ENGINE FUEL SPILL ON THE ENGINE. YOU MUST IMMEDIATELY REMOVE UNWANTED FUEL. THE FUEL IS FLAMMABLE AND CAN CAUSE INJURY OR DAMAGE.
WARNING: DO NOT LET ENGINE FUEL STAY ON YOUR SKIN FOR A LONG TIME. FLUSH THE FUEL FROM YOUR SKIN WITH WATER. THE FUEL IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
1
WRENCH - STANDARD
No specific
Torque wrench: range to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN ) T
No specific
Torque wrench: range to between 470 and 430 lbf.in (5.31 and 4.86 m.daN ) T
No specific
Torque wrench: range to between 480 and 440 lbf.in (5.42 and 4.97 m.daN ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.PU1-0001)
cloth
(Material No.PU2-0002)
acetone
(Material No.PU4-0010)
base primer
(Material No.PU4-0011)
activator
(Material No.PU4-0012)
thinner
(Material No.PU5-0005)
anti-seize compound
(Material No.PU6-0001)
oil
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 31-60-00-860-002-A
EIS Stop Procedure
TASK 71-00-00-720-814-A
Test No. 2A - Engine Motor Leak Test (Wet Method)
TASK 71-00-00-860-833-A
Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A
Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A
Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A
Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A
Closing of the Thrust Reverser Cowl-Doors
F Fuel Return Lines
3. Job Set-up
Subtask 73-11-48-941-072-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833)
Subtask 73-11-48-865-061-A ** ON A/C NOT FOR ALL
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VUFUEL/LP VALVE/MOT1/ENG11QGA08
121VUFUEL/LP VALVE/MOT2/ENG13QGM25
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VUFUEL/LP VALVE/MOT1/ENG22QGA09
121VUFUEL/LP VALVE/MOT2/ENG24QGM26
Subtask 73-11-48-010-064-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
Subtask 73-11-48-040-053-A ** ON A/C NOT FOR ALL
D. Deactivation of the Thrust Reverser System for Ground Maintenance
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) Make sure that you did the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).
Subtask 73-11-48-010-065-A ** ON A/C NOT FOR ALL
E. Get Access
   (1) Make sure that the left thrust reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
   (2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
4. Procedure
Subtask 73-11-48-420-054-A ** ON A/C NOT FOR ALL
A. Installation of the Return Fuel Lines
CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN TWIST THE TUBES OR HOSES OR CAUSE DAMAGE TO THEM.
CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
   (1) Use the second WRENCH - STANDARD when you tighten the tube or the hose nuts.
CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
   (2) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine and adjacent components.
   (3) Install the return fuel hose (15).
     (a) Apply a thin layer of the oil (Material No.PU6-0001) or equivalent to the threads of the return fuel hose (15).
     (b) Connect the return fuel hose (15) to the pylon interface and tighten the coupling nut with your hand.
       1 Do not torque the return fuel hose (15) coupling nut at this time.
   (4) Install the upper fuel return tube (12).
     (a) Apply a thin layer of the oil (Material No.PU6-0001) or equivalent to the threads of the upper fuel return tube (12).
     (b) Connect the upper fuel return tube (12) to the return fuel hose (15) and tighten the coupling nut with your hand.
       1 Do not torque the upper fuel return tube (12) coupling nut at this time.
     (c) Attach the upper fuel return tube (12) to the return fuel bracket with the bolt (17), washer (16) and clamp (18).
       1 Do not torque the bolt (17) at this time.
     (d) Attach the upper fuel return tube (12) to the return fuel bracket with the bolt (14), washer (11) and clamp (13).
       1 Do not torque the bolt (14) at this time.
     (e) Attach the upper fuel return tube (12) to the harness bracket with the bolt (10), washer (11) and clamp (9).
       1 Do not torque the bolt (10) at this time.
   (5) Install the elbow (5).
CAUTION: PUT THE ANTI-SEIZE COMPOUND ONLY ON THE THREADS OF THE ELBOW. DO NOT LET THE ANTI-SEIZE COMPOUND GET ON OTHER SURFACES. IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO THE EQUIPMENT CAN OCCUR.
     (a) Apply a thin layer of the anti-seize compound (Material No.PU5-0005) to the threads of the elbow (5) which will attach to the fuel return valve.
     (b) Apply a thin layer of the oil (Material No.PU6-0001) or equivalent to the threads of the elbow (5) which will attach to the lower fuel return tube (1).
     (c) Connect the elbow (5) to the fuel return valve.
       1 Do not torque the elbow (5) at this time.
   (6) Install the lower fuel return tube (1).
     (a) Apply a thin layer of the oil (Material No.PU6-0001) or equivalent to the threads of the lower fuel return hose (1).
     (b) Connect the lower fuel return tube (1) to the upper fuel return tube (12) and tighten the coupling nut with your hand.
       1 Do not torque the lower fuel return tube (1) coupling nut at this time.
     (c) Connect the lower fuel return tube (1) to the elbow (5) and tighten the coupling nut with your hand.
       1 Do not torque the lower fuel return tube (1) coupling nut at this time.
     (d) Attach the lower fuel return tube (1) to the middle return fuel bracket with the bolt (8), washer (7) and clamp (6).
       1 Do not torque the bolt (8) at this time.
     (e) Attach the lower fuel return tube (1) to the lower return fuel bracket with the bolt (2), washer (3) and clamp (4).
       1 Do not torque the bolt (2) at this time.
   (7) Adjust the tubes (1) and (12) and the hose (15) to keep the load to a minimum.
   (8) TORQUE the coupling nut on the elbow (5) to between 470 and 430 lbf.in (5.31 and 4.86 m.daN ) T.
   (9) TORQUE the coupling nut on the return fuel hose (15) to between 480 and 440 lbf.in (5.42 and 4.97 m.daN ) T.
   (10) Hold the return fuel hose (15) with the applicable WRENCH - STANDARD.
     (a) TORQUE the coupling nut on the upper fuel return tube (12) to the return fuel hose (15) to between 470 and 430 lbf.in (5.31 and 4.86 m.daN ) T.
   (11) Hold the lower fuel return tube (1) with the applicable WRENCH - STANDARD.
     (a) TORQUE the coupling nut on the upper fuel return tube (12) to the lower fuel return tube (1) to between 470 and 430 lbf.in (5.31 and 4.86 m.daN ) T.
   (12) Hold the elbow (5) with the applicable WRENCH - STANDARD.
     (a) TORQUE the coupling nut on the lower fuel return tube (1) to the elbow (5) to between 470 and 430 lbf.in (5.31 and 4.86 m.daN ) T.
   (13) TORQUE the bolts (2), (8), (10), (14) and (17) to between 35 and 31.5 lbf.in (0.40 and 0.36 m.daN ) T.
   (14) Apply the torque stripe on the fuel return line.
     (a) Clean the surfaces of the coupling nuts on the lower fuel return tube (1), upper fuel return tube (12), fuel return hose (15), elbow (5) and adjacent surfaces.
       1 Use the clean cloth (Material No.PU1-0001) and the acetone (Material No.PU2-0002) .
       2 Clean until you remove all the contamination you can see.
     (b) Clean again the surfaces of the coupling nuts on the lower fuel return tube (1), upper fuel return tube (12), fuel return hose (15), elbow (5) and adjacent surfaces.
       1 Use the clean cloth (Material No.PU1-0001) and the acetone (Material No.PU2-0002) .
       2 Remove the acetone (Material No.PU2-0002) with the clean cloth (Material No.PU1-0001) before the acetone (Material No.PU2-0002) becomes dry.
     (c) Clean the surfaces of the coupling nuts on the lower fuel return tube (1), upper fuel return tube (12), fuel return hose (15), elbow (5) and adjacent surfaces one more time with the clean cloth (Material No.PU1-0001) .
     (d) Mix the base primer (Material No.PU4-0010) with the activator (Material No.PU4-0011) and the thinner (Material No.PU4-0012) .
       1 Refer to the instructions of the manufacturer.
     (e) Paint the torque stripe on the coupling nuts of the lower fuel return tube (1), upper fuel return tube (12), fuel return hose (15), elbow (5) and adjacent surfaces with the base primer (Material No.PU4-0010) .
5. Close-up
Subtask 73-11-48-860-056-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
Subtask 73-11-48-865-060-A ** ON A/C NOT FOR ALL
B. Close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VUFUEL/LP VALVE/MOT1/ENG11QGA08
121VUFUEL/LP VALVE/MOT2/ENG13QGM25
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VUFUEL/LP VALVE/MOT1/ENG22QGA09
121VUFUEL/LP VALVE/MOT2/ENG24QGM26
Subtask 73-11-48-410-060-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the access platform(s).
   (3) Close the left thrust reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
Subtask 73-11-48-440-052-A ** ON A/C NOT FOR ALL
D. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 73-11-48-410-061-A ** ON A/C NOT FOR ALL
E. Close Access
   (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
   (2) Remove the WARNING NOTICE(S).
Subtask 73-11-48-710-050-A ** ON A/C NOT FOR ALL
F. Test
   (1) Do test No. 2A - Engine motor leak test (wet method) (Ref. AMM TASK 71-00-00-720-814).
[Rev.10 from 2021] 2026.04.01 13:14:42 UTC
"Aviabrain" 2025