DOC AIRBUS | AMM A320FRemoval of the High Pressure Turbine (HPT) Active Clearance Control (ACC) Valve [CFML]
TASK 75-21-05-000-801-A
Removal of the High Pressure Turbine (HPT) Active Clearance Control (ACC) Valve
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 75-21-05-941-050-A
[Rev.10 from 2021]
2026.04.01 12:57:44 UTC
Removal of the High Pressure Turbine (HPT) Active Clearance Control (ACC) Valve
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 | CAP - PROTECTION |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | COVER - PROTECTION |
| No specific | 1 | PLIERS - CONNECTOR, JAW, SOFT |
| No specific | AR | WARNING NOTICE(S) |
| No specific | 2 | WRENCH - TORQUE |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 451AL | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| 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 |
HPT ACC Valve PRE and POST SB LEAP-1A 72-0292Subtask 75-21-05-941-050-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 75-21-05-010-050-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
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.
Subtask 75-21-05-040-050-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 for Maintenance
Subtask 75-21-05-010-052-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 left thrust reverser cowl-door (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL.
4. Procedure(1) Open the left thrust reverser cowl-door (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL.
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.
Subtask 75-21-05-020-050-A A. Removal of the HPT ACC Valve
(1) Put a CONTAINER 5 L (1.32 USGAL) below the HPT ACC valve (1).
(2) Use the two WRENCH - TORQUE to disconnect the drain tube (4) B-nut from the HPT ACC valve (1) fitting.
(3) Disconnect the electrical connector (2) from the HPT ACC valve (1). If necessary, use the PLIERS - CONNECTOR, JAW, SOFT.
(4) Remove the ACC wye duct (17) as follows:
(a) Remove the hose clamp (19) that attaches the ACC wye duct (17) to the HPT ACC valve (1).
(b) Remove the hose clamp (13) that attaches the ACC wye duct (17) to the Low Pressure Turbine (LPT) ACC valve (12).
(c) Remove the hose clamp (15) that attaches the ACC wye duct (17) to the ACC inlet duct (16).
(d) Remove the ACC wye duct (17) from the engine.
(5) Remove the hose clamp (7) that attaches the HPT aft valve elbow duct (9) to the HPT ACC valve (1).
(6) Remove the four bolts (6) that attach the MTC-ACC fuel HYDR manifold (5) to the HPT ACC valve (1).
POST SB LEAP-1A 72-0292
(7) Remove and keep the bracket (22).
END OF POST SB LEAP-1A 72-0292
(8) Remove and discard the gasket seal (3).
(9) Remove the bolt (18) and the washer (20) that attach the HPT ACC valve (1) to the bracket (14).
(10) Hold the HPT ACC valve (1) and remove the two bolts (8) and the two washers (21)that attach the HPT ACC valve (1) to the bracket (10) and the bracket (11) and remove the HPT ACC valve (1) from the engine.
(11) Install the COVER - PROTECTION and the CAP - PROTECTION on all the open ports, open tubes, open hoses and connectors.
Subtask 75-21-05-620-050-A (1) Put a CONTAINER 5 L (1.32 USGAL) below the HPT ACC valve (1).
(2) Use the two WRENCH - TORQUE to disconnect the drain tube (4) B-nut from the HPT ACC valve (1) fitting.
(3) Disconnect the electrical connector (2) from the HPT ACC valve (1). If necessary, use the PLIERS - CONNECTOR, JAW, SOFT.
(4) Remove the ACC wye duct (17) as follows:
(a) Remove the hose clamp (19) that attaches the ACC wye duct (17) to the HPT ACC valve (1).
(b) Remove the hose clamp (13) that attaches the ACC wye duct (17) to the Low Pressure Turbine (LPT) ACC valve (12).
(c) Remove the hose clamp (15) that attaches the ACC wye duct (17) to the ACC inlet duct (16).
(d) Remove the ACC wye duct (17) from the engine.
(5) Remove the hose clamp (7) that attaches the HPT aft valve elbow duct (9) to the HPT ACC valve (1).
(6) Remove the four bolts (6) that attach the MTC-ACC fuel HYDR manifold (5) to the HPT ACC valve (1).
POST SB LEAP-1A 72-0292
(7) Remove and keep the bracket (22).
END OF POST SB LEAP-1A 72-0292
(8) Remove and discard the gasket seal (3).
(9) Remove the bolt (18) and the washer (20) that attach the HPT ACC valve (1) to the bracket (14).
(10) Hold the HPT ACC valve (1) and remove the two bolts (8) and the two washers (21)that attach the HPT ACC valve (1) to the bracket (10) and the bracket (11) and remove the HPT ACC valve (1) from the engine.
(11) Install the COVER - PROTECTION and the CAP - PROTECTION on all the open ports, open tubes, open hoses and connectors.
B. Preservation of the HPTACC valve
(1) In the instance of shipping or prolonged storage, preserve the HPTACC valve per theCMM 752105 .
(1) In the instance of shipping or prolonged storage, preserve the HPTACC valve per the