DOC AIRBUS | AMM A320FRemoval of the HPC Stage 7 Bleed Valve - Lower Left [IAE]
TASK 75-32-52-000-012-A
Removal of the HPC Stage 7 Bleed Valve - Lower Left
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 75-32-52-941-052-A ** ON A/C NOT FOR ALL
Subtask 75-32-52-020-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:12:36 UTC
Removal of the HPC Stage 7 Bleed Valve - Lower Left
WARNING:
DO NOT TOUCH THE FUEL OR OIL SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUT DOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | COVER - BLANKING |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-010-A | Opening 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 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
HP Compressor 7th Stage Bleed Valve - Lower LeftSubtask 75-32-52-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) 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 75-32-52-010-062-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) 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. 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
Subtask 75-32-52-040-055-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
C. Deactivate the Thrust Reverser
Subtask 75-32-52-010-054-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). D. Open the left thrust reverser half (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL
(2) FOR [1000EM2] (ENGINE-2)
461AL
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL
(2) FOR [1000EM2] (ENGINE-2)
461AL
Subtask 75-32-52-020-052-A ** ON A/C NOT FOR ALL
A. Removal of the Bleed Valve
PRE SBE 75-0071
(1) Loosen the bolts (3) which attach the silencer (4) and the bleed valve (5) to the seal carrier (1).
END OF PRE SBE 75-0071
POST SBE 75-0071 (Air - HP Compressor stage 7 bleed valves - Introduction of revised bleed valve silencer with integral seal land) and
PRE SBE 75-0105 (Air - HP Compressor stage 7 bleed valves - Introduction of an alternative bleed valve with new design)
(2) Loosen the bolts (8) and the nuts (7) which attach the silencer assembly (10) to the bleed valve (9).
END OF POST SBE 75-0071 and END OF PRE SBE 75-0105
POST SBE 75-0105
(3) Loosen the bolts (13) and the nuts (16) which attach the silencer assembly (14) to the bleed valve (12).
END OF POST SBE 75-0105
(4) Disconnect the air operation tube.
(a) Cut and discard the wire from the tube (6).
(b) Disconnect the tube from the bleed valve.
PRE SBE 75-0071
(5) Hold the valve (5) and remove the bolts (2) which attach the valve to the support duct.
(6) Remove the bleed valve with the silencer and the seal carrier attached.
END OF PRE SBE 75-0071
POST SBE 75-0071 and PRE SBE 75-0105
(7) Hold the valve (9) and remove the bolts (11) which attach the valve to the support duct.
(8) Remove the bleed valve with the silencer assembly attached.
END OF POST SBE 75-0071 and END OF PRE SBE 75-0105
POST SBE 75-0105
(9) Hold the valve (12) and remove the bolts (15) which attach the valve to the support duct.
END OF POST SBE 75-0105
Subtask 75-32-52-010-055-A ** ON A/C NOT FOR ALL PRE SBE 75-0071
(1) Loosen the bolts (3) which attach the silencer (4) and the bleed valve (5) to the seal carrier (1).
NOTE: Do not remove the bolts at this step of the procedure.
END OF PRE SBE 75-0071
POST SBE 75-0071 (Air - HP Compressor stage 7 bleed valves - Introduction of revised bleed valve silencer with integral seal land) and
PRE SBE 75-0105 (Air - HP Compressor stage 7 bleed valves - Introduction of an alternative bleed valve with new design)
(2) Loosen the bolts (8) and the nuts (7) which attach the silencer assembly (10) to the bleed valve (9).
NOTE: Do not remove the nuts and bolts at this step of the procedure.
END OF POST SBE 75-0071 and END OF PRE SBE 75-0105
POST SBE 75-0105
(3) Loosen the bolts (13) and the nuts (16) which attach the silencer assembly (14) to the bleed valve (12).
NOTE: Do not remove the bolts at this step of the procedure.
END OF POST SBE 75-0105
(4) Disconnect the air operation tube.
(a) Cut and discard the wire from the tube (6).
(b) Disconnect the tube from the bleed valve.
PRE SBE 75-0071
(5) Hold the valve (5) and remove the bolts (2) which attach the valve to the support duct.
(6) Remove the bleed valve with the silencer and the seal carrier attached.
END OF PRE SBE 75-0071
POST SBE 75-0071 and PRE SBE 75-0105
(7) Hold the valve (9) and remove the bolts (11) which attach the valve to the support duct.
(8) Remove the bleed valve with the silencer assembly attached.
END OF POST SBE 75-0071 and END OF PRE SBE 75-0105
POST SBE 75-0105
(9) Hold the valve (12) and remove the bolts (15) which attach the valve to the support duct.
END OF POST SBE 75-0105
B. Removal of the Silencer and the Seal Carrier
PRE SBE 75-0071
(1) Remove the bolts (3) which attach the silencer (4) and the bleed valve (5) to the seal carrier (1).
(2) Remove the silencer and the seal carrier from the bleed valve.
END OF PRE SBE 75-0071
POST SBE 75-0071 and PRE SBE 75-0105
(3) Remove the bolts (8) and the nuts (7) which attach the silencer assembly (10) to the bleed valve (9).
(4) Remove the silencer assembly from the bleed valve.
END OF POST SBE 75-0071 and END OF PRE SBE 75-0105
POST SBE 75-0105
(5) Remove the bolts (13) and the nuts (16) which attach the silencer assembly (14) to the bleed valve (12).
(6) Remove the silencer assembly (14) from the bleed valve (12).
END OF POST SBE 75-0105
Subtask 75-32-52-620-052-A ** ON A/C NOT FOR ALL PRE SBE 75-0071
(1) Remove the bolts (3) which attach the silencer (4) and the bleed valve (5) to the seal carrier (1).
(2) Remove the silencer and the seal carrier from the bleed valve.
END OF PRE SBE 75-0071
POST SBE 75-0071 and PRE SBE 75-0105
(3) Remove the bolts (8) and the nuts (7) which attach the silencer assembly (10) to the bleed valve (9).
(4) Remove the silencer assembly from the bleed valve.
END OF POST SBE 75-0071 and END OF PRE SBE 75-0105
POST SBE 75-0105
(5) Remove the bolts (13) and the nuts (16) which attach the silencer assembly (14) to the bleed valve (12).
(6) Remove the silencer assembly (14) from the bleed valve (12).
END OF POST SBE 75-0105
C. Put the COVER - BLANKING on all the openings.