Removal of the Low Pressure Turbine Active Clearance Control (LPTACC) Valve [CFMB]

TASK 75-22-10-000-002-A
Removal of the Low Pressure Turbine Active Clearance Control (LPTACC) Valve

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job

NOTE: Interferences between the LPTACC Inlet Airscoop 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 to incorporate this SB at the opportunity of LPTACC Removal/Installation.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	CAP - BLANKING
No specific	AR	CONTAINER 4 L (1 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	PLIERS - CONNECTOR, JAW, SOFT
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
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
LPTACC Valve
Exploded View of LPTACC Valve Installation

3. Job Set-up
Subtask 75-22-10-941-051-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 75-22-10-861-051-A ** ON A/C NOT FOR ALL

B. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 75-22-10-865-055-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

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

Subtask 75-22-10-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 75-22-10-040-052-A ** ON A/C NOT FOR ALL

E. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 75-22-10-010-054-A ** ON A/C NOT FOR ALL

F. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 75-22-10-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the LPTACC Valve
(1) Disconnect the 2 electrical connectors (10) from LPTACC valve (90).

NOTE: Use PLIERS - CONNECTOR, JAW, SOFT only if necessary.

(2) Put CAP - BLANKING on the electrical connectors (10) and on the LPTACC valve electrical receptacles.
(3) Put a CONTAINER 4 L (1 USGAL) below the LPTACC valve (90) to collect a possible fuel drainage.
(4) Loosen drain tube (80) coupling nut from LPTACC valve (90) drain nipple.
(5) Remove the four bolts (30) which attach the fuel manifold plate (20) to LPTACC valve (90). Remove and retain the gasket (40).
(6) Remove the clamp (60) which attaches the Low Pressure Turbine (LPT) cooling air tube (50) to LPTACC valve (90).
(7) Remove the two bolts (120) which attach the air scoop (100) to the forward bracket (110).
(8) Remove the two bolts (140) which attach the outboard bracket assy (150) and the LPTACC valve (90) assembly to the inboard bracket (130). Then, carefully move down and remove the LPTACC valve (90) together with bracket (150) and air scoop (100).

NOTE: The inboard bracket (130), which is core engine bracket, is not removed.

(9) Disassemble the LPTACC valve (90), the bracket (150) and the airscoop (100) to move these 3 items apart:
(a) Put the assembly on a workbench.
(b) Remove the 6 bolts (70) which attach:

The large, vertical leg of item (150) to the item (100) with the circular flange of item (90) in between. Thus, remove 2 bolts (70).
The circular flange of item (90) directly to the item (100). Thus, remove the last 4 bolts (70).

(c) Remove the 2 bolts (160) which attach the small, horizontal leg of item (150) directly to the body of valve (90).
(10) Put the PLUG-BLANKING in each disconnected line end.
(11) Put CAP - BLANKING and/or COVER - PROTECTION on all the disconnected air and fuel orifices of items (90), (50), (100), (80) and (20).

[Rev.10 from 2021] 2026.04.01 03:10:07 UTC