W DOC AIRBUS | AMM A320F

Installation of the Fuel Return Valve [CFMB]

TASK 73-11-50-400-002-A
Installation of the Fuel Return Valve

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
PLIERS - CONNECTOR, JAW, SOFT
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 110 and 100 lbf.in (1.24 and 1.13 m.daN ) T
No specific
Torque wrench: range to between 150 and 135 lbf.in (1.70 and 1.53 m.daN ) T
No specific
Torque wrench: range to between 315 and 300 lbf.in (3.56 and 3.39 m.daN ) T
No specific
Torque wrench: range to between 550 and 450 lbf.in (6.22 and 5.09 m.daN ) T
No specific
Torque wrench: range to between 1050 and 1000 lbf.in (11.87 and 11.30 m.daN ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP2101)
graphite grease
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 71-13-00-010-040-B
Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B
Closing of the Fan Cowl Doors
TASK 73-11-50-360-002-A
Leak Check and Functional Test of the Fuel Return Valve
F Fuel Return Valve PRE SB CFM 73-0096
F Fuel Return Valve POST SB CFM 73-0096
3. Job Set-up
Subtask 73-11-50-860-051-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
   (2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
Subtask 73-11-50-865-056-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: 1000EM1 (ENGINE1)
49VUFUEL/LP VALVE/MOT1/ENG11QGA08
121VUFUEL/LP VALVE/MOT2/ENG13QGM25
FOR FIN: 1000EM2 (ENGINE2)
49VUFUEL/LP VALVE/MOT1/ENG22QGA09
121VUFUEL/LP VALVE/MOT2/ENG24QGM26
Subtask 73-11-50-010-059-A ** ON A/C NOT FOR ALL
C. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
   (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
   (2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
4. Procedure
Subtask 73-11-50-420-056-A ** ON A/C NOT FOR ALL
A. Installation of the Fuel Return Valve
CAUTION: TAKE CARE DURING FUEL RETURN VALVE INSTALLATION NOT TO DAMAGE THE NIPPLES.
   (1) Remove the blanking caps.
   (2) Install the fuel return valve in position on the bracket (20), on the fan frame between flanges E and F, at the 10 o'clock position.
     (a) Lubricate the threads of the bolts (100) with graphite grease (Material No.CP2101) .
     (b) Attach the fuel return valve to the bracket (20) with the bolts (100) and the washers (110).

PRE SB CFM 73-0096

   (3) Lubricate the threads of the nipples with fuel, and connect the tubes and the hoses that follow:
     (a) Shutoff signal (PB/PSF) fuel tube (30)
     (b) Fuel pump HP tube (40)
     (c) IDG cooler tube (50)
     (d) Fuel pump LP tube (60)
     (e) Drain tube (90)
     (f) Fuel return tube (10).
     (g) Install the coupling nuts as follows:
CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:
  • ONE WRENCH TO HOLD THE UNION, AND
  • ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.
THIS PREVENTS DAMAGE TO THE PARTS.
       1 TORQUE the shutoff signal (PB/PSF) fuel tube (30) and the fuel pump HP tube (40) coupling nuts to between 150 and 135 lbf.in (1.70 and 1.53 m.daN ) T.
       2 TORQUE the drain tube (90) coupling nut to between 315 and 300 lbf.in (3.56 and 3.39 m.daN ) T.
       3 TORQUE the fuel return tube (10) coupling nut to between 1050 and 1000 lbf.in (11.87 and 11.30 m.daN ) T.
       4 TORQUE the IDG cooler tube (50) and the Fuel pump LP tube (60) coupling nuts to between 550 and 450 lbf.in (6.22 and 5.09 m.daN ) T.

END OF PRE SB CFM 73-0096



POST SB CFM 73-0096

   (4) Lubricate the threads of the nipples with fuel, and connect the tubes and hoses that follow:
     (a) Fuel pump HP tube (40)
     (b) Fuel pump LP tube (60)
     (c) Bypass (PB/PSF) fuel tube (30) on the fuel return valve and on the fuel pump LP tube (60).
     (d) IDG cooler tube (50)
     (e) Drain tube (90)
     (f) Fuel return tube (10).
     (g) Install the coupling nuts as follows:
CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:
  • ONE WRENCH TO HOLD THE UNION, AND
  • ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.
THIS PREVENTS DAMAGE TO THE PARTS.
       1 TORQUE the bypass (PB/PSF) fuel tube (30) and the fuel pump HP tube (40) coupling nuts to between 150 and 135 lbf.in (1.70 and 1.53 m.daN ) T.
       2 TORQUE the drain tube (90) coupling nut to between 315 and 300 lbf.in (3.56 and 3.39 m.daN ) T.
       3 TORQUE the fuel return tube (10) coupling nut to between 1050 and 1000 lbf.in (11.87 and 11.30 m.daN ) T.
       4 TORQUE the IDG cooler tube (50) and the Fuel pump LP tube (60) coupling nuts to between 550 and 450 lbf.in (6.22 and 5.09 m.daN ) T.

END OF SB CFM 73-0096

   (5) TORQUE the bolts (100) to between 110 and 100 lbf.in (1.24 and 1.13 m.daN ) T.
   (6) Make sure that the connectors and the receptacles are clean and clear of unwanted materials.
   (7) Connect HJ7 harness connectors (70) and HJ8 harness connector (80) to the FRV receptacle. Use the PLIERS - CONNECTOR, JAW, SOFT only if necessary.
   (8) Make sure that the connectors are fully engaged and do not move.
Subtask 73-11-50-865-054-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VUFUEL/LP VALVE/MOT1/ENG11QGA08
121VUFUEL/LP VALVE/MOT2/ENG13QGM25
FOR FIN: 1000EM2 (ENGINE2)
49VUFUEL/LP VALVE/MOT1/ENG22QGA09
121VUFUEL/LP VALVE/MOT2/ENG24QGM26
Subtask 73-11-50-360-054-A ** ON A/C NOT FOR ALL
C. Do a leak check (Ref. AMM TASK 73-11-50-360-002).
5. Close-up
Subtask 73-11-50-410-056-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) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (3) Remove the WARNING NOTICE(S).
Subtask 73-11-50-862-051-A ** ON A/C NOT FOR ALL
B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.01 13:05:17 UTC
"Aviabrain" 2025