DOC AIRBUS | AMM A320FInstallation of the Low Pressure Turbine Active Clearance Control (LPTACC) Valve [CFMB]
TASK 75-22-10-400-002-A
Installation of the Low Pressure Turbine Active Clearance Control (LPTACC) Valve
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 75-22-10-860-051-A ** ON A/C NOT FOR ALL
Subtask 75-22-10-420-051-A ** ON A/C NOT FOR ALL
Subtask 75-22-10-410-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:10:09 UTC
Installation of the Low Pressure Turbine Active Clearance Control (LPTACC) Valve
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobNOTE: Interferences between the LPTACC inlet air scoop assy and the Thrust reverser cowl have been observed in production on a limited number of A320 Family aircraft powered with CFM56-5B/3 engines. CFM has issued SB CFM56-5B S/B 75-0044. In order to recover the gap between the LPTACC scoop and the Thrust reverser cowl to avoid potential interference, Airbus recommends this SB be incorporated this SB at the opportunity of LPTACC Removal/Installation.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2101) | graphite grease |
| (Material No.CP2442) | engine oil |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 40 | GASKET | AIPC 75-22-10-01-030 |
| 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 71-00-00-710-006-B | Minimum Idle Check |
| 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 78-30-00-081-041-B | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-B | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-B | Closing of the Thrust Reverser Doors |
LPTACC ValveSubtask 75-22-10-860-051-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).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 75-22-10-865-058-A ** ON A/C NOT FOR ALL (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).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 75-22-10-010-055-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 1000EM1 (ENGINE1) | |||
| 49VU | FUEL/LP VALVE/MOT1/ENG1 | 1QG | A08 |
| 121VU | FUEL/LP VALVE/MOT2/ENG1 | 3QG | M25 |
| FOR FIN: 1000EM2 (ENGINE2) | |||
| 49VU | FUEL/LP VALVE/MOT1/ENG2 | 2QG | A09 |
| 121VU | FUEL/LP VALVE/MOT2/ENG2 | 4QG | M26 |
C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 75-22-10-040-053-A ** ON A/C NOT FOR ALL 4. Procedure(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 75-22-10-420-051-A ** ON A/C NOT FOR ALL
A. Installation of the Low Pressure Turbine Active Clearance Control (LPTACC) Valve
(1) Assemble together the LPTACC valve (90), the bracket (150) and the air scoop (100) as follows:
(a) Put the LPTACC valve (90) on a workbench. Remove blanking parts from the air/fuel orifices.
(b) Lubricate the threads of six bolts (70) and of two bolts (160) with graphite grease (Material No.CP2101) .
(c) Put the air scoop (100) and the bracket (150) in their correct position relative to the LPTACC valve (90) and attach these items to the valve (90) with the six bolts (70).
(e) TORQUE the six bolts (70) and the two bolts (160) to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )
.
(2) Install the assembly of LPTACC valve, bracket and air scoop on the engine as follows:
(a) Lubricate the two bolts (140) with graphite grease (Material No.CP2101) .
(b) Carefully put the valve assembly (90) in its correct position relative to the engine. Attach it to the inboard core engine bracket (130) with the 2 bolts (140), bolt heads afterward. Tighten bolts (140) with your hand.
(3) Lubricate the two bolts (120) with graphite grease (Material No.CP2101) .
(4) Install the two bolts (120) to attach the air scoop (100) to the forward bracket (110).
(5) TORQUE the two bolts (140) and the two bolts (120) to between 110 and 100 lbf.in (1.24 and 1.13 m.daN ).
(6) Connect the drain tube (80) as follows:
(a) Lubricate the threads of the drain tube (80) coupling nut with engine oil (Material No.CP2442) .
(b) Connect the coupling nut of drain tube (80) to the drain nipple of LPTACC valve (90).
(c) TORQUE the coupling nut to between 150 and 135 lbf.in (1.70 and 1.53 m.daN ).
(7) Connect the fuel manifold plate (20) to the LPTACC valve (90) as follows:
(a) Make sure the related mating surfaces are clean.
(b) Make sure the gasket (40) is in good condition. If not, replace by a new one.
(c) Lubricate AIPC 75-22-10-01-030 GASKET (40) with engine oil (Material No.CP2442) and install between the fuel manifold plate (20) and the LPTACC valve (90). Make sure to align fuel passage holes correctly.
(d) Lubricate four bolts (30) with graphite grease (Material No.CP2101) and install to attach the fuel manifold plate (20) to the LPTACC valve (90).
(e) TORQUE the four bolts (30) to between 130 and 100 lbf.in (1.47 and 1.13 m.daN ).
(8) Connect the Low Pressure Turbine (LPT) cooling air tube (50) to the LPTACC valve (90) with the clamp (60) as follows:
(a) Lubricate the nut of the clamp (60) with graphite grease (Material No.CP2101) .
(b) Install the clamp (60) to connect the LPT cooling air tube (50) to the LPTACC valve (90).
(c) Install the nut to the clamp (60).
(d) TORQUE the nut of the clamp (60) to between 45 and 33 lbf.in (0.51 and 0.37 m.daN ).
(9) Remove blanking caps from the electrical connectors and from the electrical receptacles of the valve (90).
(10) Connect the two electrical connectors (10) to the electrical receptacles of the valve (90). Fully tighten the connectors with your hand.
Subtask 75-22-10-410-052-A ** ON A/C NOT FOR ALL (1) Assemble together the LPTACC valve (90), the bracket (150) and the air scoop (100) as follows:
(a) Put the LPTACC valve (90) on a workbench. Remove blanking parts from the air/fuel orifices.
(b) Lubricate the threads of six bolts (70) and of two bolts (160) with graphite grease (Material No.CP2101) .
(c) Put the air scoop (100) and the bracket (150) in their correct position relative to the LPTACC valve (90) and attach these items to the valve (90) with the six bolts (70).
NOTE: The two longest bolts (70) are for attachment of bracket (150) and air scoop (100) to LPTACC valve (90) in this assembly.
(d) Install the two bolts (160) to complete the attachment of bracket (150) to the LPTACC valve (90). (e) TORQUE the six bolts (70) and the two bolts (160) to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )
. (2) Install the assembly of LPTACC valve, bracket and air scoop on the engine as follows:
(a) Lubricate the two bolts (140) with graphite grease (Material No.CP2101) .
(b) Carefully put the valve assembly (90) in its correct position relative to the engine. Attach it to the inboard core engine bracket (130) with the 2 bolts (140), bolt heads afterward. Tighten bolts (140) with your hand.
(3) Lubricate the two bolts (120) with graphite grease (Material No.CP2101) .
(4) Install the two bolts (120) to attach the air scoop (100) to the forward bracket (110).
(5) TORQUE the two bolts (140) and the two bolts (120) to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )
. (6) Connect the drain tube (80) as follows:
(a) Lubricate the threads of the drain tube (80) coupling nut with engine oil (Material No.CP2442) .
(b) Connect the coupling nut of drain tube (80) to the drain nipple of LPTACC valve (90).
(c) TORQUE the coupling nut to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )
. (7) Connect the fuel manifold plate (20) to the LPTACC valve (90) as follows:
(a) Make sure the related mating surfaces are clean.
(b) Make sure the gasket (40) is in good condition. If not, replace by a new one.
(c) Lubricate AIPC 75-22-10-01-030 GASKET (40) with engine oil (Material No.CP2442) and install between the fuel manifold plate (20) and the LPTACC valve (90). Make sure to align fuel passage holes correctly.
(d) Lubricate four bolts (30) with graphite grease (Material No.CP2101) and install to attach the fuel manifold plate (20) to the LPTACC valve (90).
(e) TORQUE the four bolts (30) to between 130 and 100 lbf.in (1.47 and 1.13 m.daN )
. (8) Connect the Low Pressure Turbine (LPT) cooling air tube (50) to the LPTACC valve (90) with the clamp (60) as follows:
(a) Lubricate the nut of the clamp (60) with graphite grease (Material No.CP2101) .
(b) Install the clamp (60) to connect the LPT cooling air tube (50) to the LPTACC valve (90).
(c) Install the nut to the clamp (60).
(d) TORQUE the nut of the clamp (60) to between 45 and 33 lbf.in (0.51 and 0.37 m.daN )
. (9) Remove blanking caps from the electrical connectors and from the electrical receptacles of the valve (90).
(10) Connect the two electrical connectors (10) to the electrical receptacles of the valve (90). Fully tighten the connectors with your hand.
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 75-22-10-440-051-A ** ON A/C NOT FOR ALL Subtask 75-22-10-865-056-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 75-22-10-710-051-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 1000EM1 (ENGINE1) | |||
| 49VU | FUEL/LP VALVE/MOT1/ENG1 | 1QG | A08 |
| 121VU | FUEL/LP VALVE/MOT2/ENG1 | 3QG | M25 |
| FOR FIN: 1000EM2 (ENGINE2) | |||
| 49VU | FUEL/LP VALVE/MOT1/ENG2 | 2QG | A09 |
| 121VU | FUEL/LP VALVE/MOT2/ENG2 | 4QG | M26 |
E. Do a minimum idle leak check (Ref. AMM TASK 71-00-00-710-006) and make sure that no fault message for the LPTACC valve is recorded on the PFR.
5. Close-upSubtask 75-22-10-410-053-A ** ON A/C NOT FOR ALL
A. Close Access
(1) 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
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
Subtask 75-22-10-862-051-A ** ON A/C NOT FOR ALL (1) 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
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).