DOC AIRBUS | AMM A320FRemoval of the Fuel Flow Transmitter [CFML]
TASK 73-31-10-000-802-A
Removal of the Fuel Flow Transmitter
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 73-31-10-941-052-A
Subtask 73-31-10-020-052-A
[Rev.10 from 2021]
2026.04.01 03:06:35 UTC
Removal of the Fuel Flow Transmitter
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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CAP - PROTECTION |
| No specific | 1 | CONTAINER 20L (5 USGAL) |
| No specific | AR | COVER - PROTECTION |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 72-24-01-000-801-A | Removal of Segment Shrouds 1 thru 5 |
| TASK 72-24-80-000-801-A | Removal of the Variable Bleed Valve (VBV) Ducts |
| TASK 78-30-00-040-809-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-36-00-010-806-A | Opening of the Thrust Reverser Cowl Doors |
Fuel Flow TransmitterSubtask 73-31-10-941-052-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 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 73-31-10-010-056-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 WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch, and
- 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
Subtask 73-31-10-040-054-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
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 73-31-10-010-057-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 maintenance (Ref. AMM TASK 78-30-00-040-809). D. Get Access
(1) Open the right thrust reverser cowl-door (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR
4. Procedure(1) Open the right thrust reverser cowl-door (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR
Subtask 73-31-10-020-052-A
A. Removal of the Fuel Flow Transmitter
(1) Remove the segment shroud 2 (Ref. AMM TASK 72-24-01-000-801).
(2) Remove the Variable Bleed Valve (VBV) duct 2 and 3 (Ref. AMM TASK 72-24-80-000-801).
(3) Remove the segment shroud 3 (Ref. AMM TASK 72-24-01-000-801).
(4) Remove the VBV duct 4 (Ref. AMM TASK 72-24-80-000-801).
(5) Remove the bolt (5) that attaches the HJ5A electrical harness (7) and the loop clamp (6) to the support bracket (8).
(6) Disconnect the electrical connector (4) from the fuel flow transmitter (3). If necessary, use PLIERS - NOSE, SOFT, LONG.
(7) Remove the fuel flow transmitter (3) as follows:
(b)
PRE SB 72-0221
Loosen the four bolts (16) and (18) that attach the P23 fuel supply tube (9), flowmeter support brackets (19) and (17), and electrical harnesses support bracket (20).
(c) Remove the four bolts (10) that attach the P23 fuel supply tube (9) to the fuel flow transmitter (3).
END OF PRE SB 72-0221
(d)
POST SB 72-0221
Remove the four bolts (21) that attach the P23 fuel supply tube (9), flowmeter support bracket (23) and fuel valve support bracket (22) to the fuel flow transmitter (3).
END OF POST SB 72-0221
(e) Drain the fuel into a CONTAINER 20L (5 USGAL).
(f) Remove and discard the gasket, fuel and oil flange seal (11) from where the P23 fuel supply tube (9) was removed before.
(g)
PRE SB 72-0273
Loosen the two bolts (24) that attach the flowmeter support bracket (26) or (27) to the P22 fuel supply tube (14).
(h) Remove the four bolts (25) that attach the P22 fuel supply tube (14) to the fuel flow transmitter (3).
END OF PRE SB 72-0273
(i)
POST SB 72-0273
Remove the four bolts (28) that attach the P22 fuel supply tube (14) and flowmeter support bracket (29) or (30) to the fuel flow transmitter (3).
END OF POST SB 72-0273
(j) Remove the fuel flow transmitter (3) and remove and discard the gasket, fuel and oil flange seal (12).
Subtask 73-31-10-620-051-A (1) Remove the segment shroud 2 (Ref. AMM TASK 72-24-01-000-801).
(2) Remove the Variable Bleed Valve (VBV) duct 2 and 3 (Ref. AMM TASK 72-24-80-000-801).
(3) Remove the segment shroud 3 (Ref. AMM TASK 72-24-01-000-801).
(4) Remove the VBV duct 4 (Ref. AMM TASK 72-24-80-000-801).
(5) Remove the bolt (5) that attaches the HJ5A electrical harness (7) and the loop clamp (6) to the support bracket (8).
(6) Disconnect the electrical connector (4) from the fuel flow transmitter (3). If necessary, use PLIERS - NOSE, SOFT, LONG.
(7) Remove the fuel flow transmitter (3) as follows:
WARNING:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
CAUTION:
DO NOT LET ENGINE FUEL FALL ON THE ENGINE. UNWANTED FUEL MUST BE REMOVED IMMEDIATELY. THE FUEL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.
(a) Put a CONTAINER 20L (5 USGAL) below the fuel flow transmitter (3). (b)
PRE SB 72-0221
Loosen the four bolts (16) and (18) that attach the P23 fuel supply tube (9), flowmeter support brackets (19) and (17), and electrical harnesses support bracket (20).
(c) Remove the four bolts (10) that attach the P23 fuel supply tube (9) to the fuel flow transmitter (3).
END OF PRE SB 72-0221
(d)
POST SB 72-0221
Remove the four bolts (21) that attach the P23 fuel supply tube (9), flowmeter support bracket (23) and fuel valve support bracket (22) to the fuel flow transmitter (3).
END OF POST SB 72-0221
(e) Drain the fuel into a CONTAINER 20L (5 USGAL).
(f) Remove and discard the gasket, fuel and oil flange seal (11) from where the P23 fuel supply tube (9) was removed before.
(g)
PRE SB 72-0273
Loosen the two bolts (24) that attach the flowmeter support bracket (26) or (27) to the P22 fuel supply tube (14).
(h) Remove the four bolts (25) that attach the P22 fuel supply tube (14) to the fuel flow transmitter (3).
END OF PRE SB 72-0273
(i)
POST SB 72-0273
Remove the four bolts (28) that attach the P22 fuel supply tube (14) and flowmeter support bracket (29) or (30) to the fuel flow transmitter (3).
END OF POST SB 72-0273
(j) Remove the fuel flow transmitter (3) and remove and discard the gasket, fuel and oil flange seal (12).
B. Preservation of the Fuel Flow Transmitter
CMM 733105 .
(2) Install the COVER - PROTECTION and CAP - PROTECTION on all the open ports, open tubes, open hoses and disconnected connectors.
CAUTION:
MAKE SURE THE FUEL TRANSMITTER IS NOT OPEN TO THE AIR FOR MORE THAN 24 HOURS. IF THE FUEL TRANSMITTER IS NOT CORRECTLY PRESERVED AFTER 24 HOURS, INTERNAL CORROSION DAMAGE CAN OCCUR.
(1) In the instance of shipping or prolonged storage, preserve the fuel flow transmitter (2) Install the COVER - PROTECTION and CAP - PROTECTION on all the open ports, open tubes, open hoses and disconnected connectors.