DOC AIRBUS | AMM A320FInstallation of the Low Pressure Turbine Active Clearance Control (LPT ACC) Valve [CFML]
TASK 75-22-05-400-801-A
Installation of the Low Pressure Turbine Active Clearance Control (LPT ACC) Valve
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 75-22-05-941-051-A
Subtask 75-22-05-420-050-A
Subtask 75-22-05-410-050-A
[Rev.10 from 2021]
2026.04.01 03:14:21 UTC
Installation of the Low Pressure Turbine Active Clearance Control (LPT 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.
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
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2442) | engine oil |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 14 | GASKET SEAL | EIPC 73-00-00-20-040 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-70-00-910-804-A | Electrical Standard Practices |
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
| TASK 73-29-00-740-803-A | Idle Test (Menu Mode) |
| TASK 78-30-00-040-809-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-30-00-440-809-A | Reactivation of the Thrust Reverser System after Ground Maintenance |
| TASK 78-36-00-010-806-A | Opening of the Thrust Reverser Cowl Doors |
| TASK 78-36-00-410-806-A | Closing of the Thrust Reverser Cowl Doors |
LPT ACC Valve (PRE and POST SB LEAP-1A 72-0292)Subtask 75-22-05-941-051-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
Subtask 75-22-05-010-052-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Make sure that the fan cowl doors are open (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) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 75-22-05-040-051-A (1) Make sure that the fan cowl doors are open (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) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 75-22-05-010-053-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) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-809). D. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.
4. Procedure(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.
Subtask 75-22-05-420-050-A
A. Installation of the Low Pressure Turbine Active Clearance Control (LPT ACC) Valve
(1) Remove all the COVER - PROTECTION and CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Install the bracket (19) to the LPT ACC valve (1) as follows:
(a) Apply engine oil (Material No.CP2442) on the threads of the two bolts (20).
(b) Put the bracket (19) in position on the LPT ACC valve (1).
(c) Install the two bolts (20) and two washers (27) that attach the bracket (19) to the LPT ACC valve (1) and hand-tighten the two bolts (20).
(d) TORQUE the two bolts (20) to between 124 and 106 lbf.in (1.40 and 1.20 m.daN )
.
(3) Install the LPT ACC valve (1) with attached bracket (19) as follows:
(a) Apply engine oil (Material No.CP2442) on the threads of the two bolts (21), bolt (23) and the two bolts (25).
(b) Put the LPT ACC valve (1) with attached bracket (19) in position on the bracket (18) and bracket (22).
(c) Install the two bolts (25) and two washers (26) that attach bracket (19) to the bracket (18) and hand-tighten the two bolts (25).
(d) Install the bolt (23) that attaches the bracket (19) to the bracket (24) and hand-tighten the bolt (23).
(e) Install the two bolts (21) that attach the bracket (22) and bracket (18) to the LPT ACC valve (1) and hand-tighten the two bolts (21).
(f) TORQUE the two bolts (25), one bolt (23) and the two bolts (21) to between 124 and 106 lbf.in (1.40 and 1.20 m.daN ).
(4) Connect the MTC-ACC fuel hydraulic manifold (15) to the LPT ACC valve (1) as follows:
(a) Apply engine oil (Material No.CP2442) to the threads of the four bolts (16).
(b) Put a new EIPC 73-00-00-20-040 GASKET SEAL (14) between the LPT ACC valve (1) and the MTC-ACC fuel hydraulic manifold (15).
(c) Install the four bolts (16) that attach the MTC-ACC fuel hydraulic manifold (15) to the LPT ACC valve (1).
(d) TORQUE the four bolts (16) to between 124 and 106 lbf.in (1.40 and 1.20 m.daN ).
(5) Connect the electrical connector (17) to the LPT ACC valve (1) (Ref. AMM TASK 70-70-00-910-804).
(6) Install the LPT ACC aft valve wye duct (7) as follows:
(a) Put the LPT ACC aft valve wye duct (7) in position between the LPT ACC valve (1) and the air duct (3) and the air duct (6).
(b) Install the hose clamp (5) that attaches the LPT ACC aft valve wye duct (7) to the air duct (6) and hand-tighten the hose clamp (5).
(c) Install the hose clamp (4) that attaches the LPT ACC aft valve wye duct (7) to the air duct (3) and hand-tighten the hose clamp (4).
(d) Install the hose clamp (2) that attaches the LPT ACC aft valve wye duct (7) to the LPT ACC valve (1) and hand-tighten the hose clamp (2).
(e) TORQUE the hose clamp (5), hose clamp (4) and hose clamp (2) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN ).
(7) Install the Active Clearance Control (ACC) wye duct (11) as follows:
(a) Put the ACC wye duct (11) in position between the LPT ACC valve (1), the High Pressure Turbine Active Clearance Control (HPT ACC) valve (13) and the ACC inlet duct (10).
(b) Install the hose clamp (9) that attaches the ACC wye duct (11) to the ACC inlet duct (10) and hand-tighten the hose clamp (9).
(c) Install the hose clamp (8) that attaches the ACC wye duct (11) to the LPT ACC valve (1) and hand-tighten the hose clamp (8).
(d) Install the hose clamp (12) that attaches the ACC wye duct (11) to the HPT ACC valve (13) and hand-tighten the hose clamp (12).
(e) TORQUE the hose clamp (9), hose clamp (8) and hose clamp (12) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN ).
5. Close-up(1) Remove all the COVER - PROTECTION and CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Install the bracket (19) to the LPT ACC valve (1) as follows:
(a) Apply engine oil (Material No.CP2442) on the threads of the two bolts (20).
(b) Put the bracket (19) in position on the LPT ACC valve (1).
(c) Install the two bolts (20) and two washers (27) that attach the bracket (19) to the LPT ACC valve (1) and hand-tighten the two bolts (20).
(d) TORQUE the two bolts (20) to between 124 and 106 lbf.in (1.40 and 1.20 m.daN )
. (3) Install the LPT ACC valve (1) with attached bracket (19) as follows:
(a) Apply engine oil (Material No.CP2442) on the threads of the two bolts (21), bolt (23) and the two bolts (25).
(b) Put the LPT ACC valve (1) with attached bracket (19) in position on the bracket (18) and bracket (22).
(c) Install the two bolts (25) and two washers (26) that attach bracket (19) to the bracket (18) and hand-tighten the two bolts (25).
(d) Install the bolt (23) that attaches the bracket (19) to the bracket (24) and hand-tighten the bolt (23).
(e) Install the two bolts (21) that attach the bracket (22) and bracket (18) to the LPT ACC valve (1) and hand-tighten the two bolts (21).
(f) TORQUE the two bolts (25), one bolt (23) and the two bolts (21) to between 124 and 106 lbf.in (1.40 and 1.20 m.daN )
. (4) Connect the MTC-ACC fuel hydraulic manifold (15) to the LPT ACC valve (1) as follows:
(a) Apply engine oil (Material No.CP2442) to the threads of the four bolts (16).
(b) Put a new EIPC 73-00-00-20-040 GASKET SEAL (14) between the LPT ACC valve (1) and the MTC-ACC fuel hydraulic manifold (15).
(c) Install the four bolts (16) that attach the MTC-ACC fuel hydraulic manifold (15) to the LPT ACC valve (1).
(d) TORQUE the four bolts (16) to between 124 and 106 lbf.in (1.40 and 1.20 m.daN )
. (5) Connect the electrical connector (17) to the LPT ACC valve (1) (Ref. AMM TASK 70-70-00-910-804).
(6) Install the LPT ACC aft valve wye duct (7) as follows:
(a) Put the LPT ACC aft valve wye duct (7) in position between the LPT ACC valve (1) and the air duct (3) and the air duct (6).
(b) Install the hose clamp (5) that attaches the LPT ACC aft valve wye duct (7) to the air duct (6) and hand-tighten the hose clamp (5).
(c) Install the hose clamp (4) that attaches the LPT ACC aft valve wye duct (7) to the air duct (3) and hand-tighten the hose clamp (4).
(d) Install the hose clamp (2) that attaches the LPT ACC aft valve wye duct (7) to the LPT ACC valve (1) and hand-tighten the hose clamp (2).
(e) TORQUE the hose clamp (5), hose clamp (4) and hose clamp (2) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )
. (7) Install the Active Clearance Control (ACC) wye duct (11) as follows:
(a) Put the ACC wye duct (11) in position between the LPT ACC valve (1), the High Pressure Turbine Active Clearance Control (HPT ACC) valve (13) and the ACC inlet duct (10).
(b) Install the hose clamp (9) that attaches the ACC wye duct (11) to the ACC inlet duct (10) and hand-tighten the hose clamp (9).
(c) Install the hose clamp (8) that attaches the ACC wye duct (11) to the LPT ACC valve (1) and hand-tighten the hose clamp (8).
(d) Install the hose clamp (12) that attaches the ACC wye duct (11) to the HPT ACC valve (13) and hand-tighten the hose clamp (12).
(e) TORQUE the hose clamp (9), hose clamp (8) and hose clamp (12) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )
. Subtask 75-22-05-410-050-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.
Subtask 75-22-05-440-050-A Subtask 75-22-05-710-050-A Subtask 75-22-05-410-051-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR.