Installation of the Low Pressure Turbine Active Clearance Control Valve (LPTACC). [CFMI]

TASK 75-22-10-400-001-A
Installation of the Low Pressure Turbine Active Clearance Control Valve (LPTACC).

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

1. Reason for the Job
Self explanatory
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	PLIERS - CONNECTOR, JAW, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )
No specific	Torque wrench: range to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )
No specific	Torque wrench: range to between 130 and 100 lbf.in (1.47 and 1.13 m.daN )
No specific	Torque wrench: range to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease
(Material No.CP2442)	engine oil

C. 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

D. Referenced Information

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 70-21-00-918-001-A	Seals (Preformed Packings and O-rings) and Gaskets
TASK 71-00-00-710-006-A	Minimum Idle Check
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 73-29-00-710-040-A-01	FADEC Ground Test Without the CFDS
TASK 73-29-00-710-040-A	Operational Test of the FADEC on the ground (with Engine Motoring)
TASK 73-29-00-710-040-A-01	FADEC Ground Test Without the CFDS
TASK 73-29-00-710-040-A-02	Operational Test of the FADEC on the Ground (with Engine non Motoring)
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
LPTACC Valve
LPTACC Valve

3. Job Set-up
Subtask 75-22-10-860-050-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 75-22-10-865-057-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 75-22-10-010-052-A ** ON A/C NOT FOR ALL

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 75-22-10-040-051-A ** ON A/C NOT FOR ALL

D. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

4. Procedure
Subtask 75-22-10-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Low Pressure Turbine Active Clearance Control Valve:
(1) Installation of the airscoop on the LPTACC valve.
(a) Put the LPTACC valve (60) on a workbench.
(b) Lubricate the threads of the 4 bolts (50) with graphite grease (Material No.CP2101) .
(c) Attach the air scoop (40) to the LPTACC valve with the 4 bolts (50) installed at the two mid attachment locations and at the two outer attachment locations.
(d) TORQUE bolts (50) to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )

.
(2) Installation of the LPTACC valve and airscoop assembly.
(a) Lubricate the threads of 2 bolts (50) with graphite grease (Material No.CP2101) .
(b) Carefully put the valve assembly in position on the engine.
(c) Attach the LPTACC valve (60) to the bracket (90) with the 2 bolts (50).
(d) Lubricate the threads of the 2 bolts (30) with graphite grease (Material No.CP2101) . Attach the air scoop (40) to forward bracket (20) with the 2 bolts (30).
(e) Lubricate the threads of the 2 bolts (100) with graphite grease (Material No.CP2101) .
(f) Attach the bracket (90) to the body of the LPTACC valve (60) with the 2 bolts (100).
(g) TORQUE the bolts (30), (50) and (100) to between 110 and 100 lbf.in (1.24 and 1.13 m.daN )

.
(h) Connect drain tube (160) as follows:

CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:

ONE WRENCH TO HOLD THE UNION, AND
ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.

THIS PREVENTS DAMAGE TO THE PARTS.

1 Remove the blanking plugs from the disconnected line ends.
2 Lubricate the drain nipple of the LPTACC valve with engine oil (Material No.CP2442) .
3 Connect the drain tube (160) to the nipple.
4 TORQUE coupling nut to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

.
(i) Attach the fuel manifold (120) to the LPTACC valve assembly (60) as follows :
1 Check for cleanliness of mating surfaces.
2 Make sure that the gasket (130) is serviceable (Ref. AMM TASK 70-21-00-918-001).
3 Install the gasket (130) lubricated with engine oil (Material No.CP2442) between the fuel manifold (120) and the fuel manifold plate (140).
4 Attach the fuel manifold (120) to the fuel manifold plate (140) with 4 bolts (110), threads lubricated with graphite grease (Material No.CP2101) .
5 TORQUE the bolts (110) to between 130 and 100 lbf.in (1.47 and 1.13 m.daN )

.
(j) Install the clamp (70) which attaches the air tube (80) to the LPTACC valve (60). TORQUE the nut of the clamp to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )

.
(k) Remove the blanking caps from the connectors.
(l) Connect the 2 electrical connectors (10). Use PLIERS - CONNECTOR, JAW, SOFT if necessary.

Subtask 75-22-10-410-051-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close thrust reverser cowl doors: (Ref. AMM TASK 78-36-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 75-22-10-440-050-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041)

Subtask 75-22-10-865-054-A ** ON A/C NOT FOR ALL

D. Remove the safety clip(s) and the tag(s) and close 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 75-22-10-710-050-A ** ON A/C NOT FOR ALL

E. Do this test:
(1) Do a FADEC ground test (Ref. AMM TASK 73-29-00-710-040).

NOTE: As an alternative procedure, you can do this operational test without the CFDS (Ref. AMM TASK 73-29-00-710-040).

(2) Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).

Subtask 75-22-10-710-050-B ** ON A/C NOT FOR ALL

E. Do a minimum idle leak check (Ref. AMM TASK 71-00-00-710-006) and make sure that no fault message related to the LPTACC valve is recorded on the PFR.

5. Close-up
Subtask 75-22-10-410-050-A ** ON A/C NOT FOR ALL

A. Close fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 75-22-10-862-050-A ** ON A/C NOT FOR ALL

B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 12:54:46 UTC