Installation of the Turbine Active Clearance Control (ACC) Air Valve [PW11]

TASK 75-24-01-400-801-A
Installation of the Turbine Active Clearance Control (ACC) Air Valve

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 400
FIN: 4055KS ** ON A/C NOT FOR ALL

1. Reason for the Job
Use this procedure to install the Active Clearance Control (ACC) air valve.
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	COVER - PROTECTION
No specific	1	MALLET - SOFT FACE
No specific	1	PLIERS - JAWED, SOFT
No specific	Torque wrench: range to between 50 and 40 lbf.in (0.57 and 0.45 m.daN )
No specific	Torque wrench: range to between 100 and 85 lbf.in (1.13 and 0.96 m.daN )
No specific	Torque wrench: range to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )
No specific	Torque wrench: range to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	lubricant, aircraft turbine engine

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-720-811-A	Test No. 3A - Idle Power Test
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 73-21-00-710-807-A	Test No.6 - EEC Operation Test (Idle Test)
TASK 73-21-00-710-809-A	Test No.15 - Operation Test (Dry Motor) of the FADEC System Engine Actuators
TASK 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Turbine Active Clearance Control (ACC) Air Valve
Turbine Active Clearance Control (ACC) Air Valve (Config-1 Initial Design Configuration)
Turbine Active Clearance Control (ACC) Air Valve (Config-2 Case Assembly Durability Improvement Configuration)

3. Job Set-up
Subtask 75-24-01-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).

Subtask 75-24-01-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 75-24-01-040-051-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System for Ground Maintenance

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 ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 75-24-01-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 75-24-01-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Turbine Active Clearance Control (ACC) Air Valve
(1) Removal of the protection covers:

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Install the ACC valve (1):

Turbine Active Clearance Control (ACC) Air Valve ** ON A/C NOT FOR ALL

(a) Apply P03-001lubricant, aircraft turbine engine on the threads of the two V-band coupling (2) bolts.
(b) Put the V-band coupling (2) on the inlet duct side of the valve (1).
(c) Put the V-band coupling (2) on the duct side of the valve (1).
(d) Put the valve (1) in position between the ducts.
(e) Move the V-band couplings (2) to engage the ducts and the valve (1).
(f) Tighten the coupling (2) V-band nut until it secures the coupling (2) to the flange between the lower ACC duct and the valve (1).
(g) Tap the coupling (2) retainer ring with the MALLET - SOFT FACE at several places around the perimeter.
(h) TORQUE the coupling (2) nut to between 50 and 40 lbf.in (0.57 and 0.45 m.daN )

.
(i) Tap the coupling (2) retainer ring with the MALLET - SOFT FACE at several places around the perimeter.
(j) TORQUE the coupling (2) nut to between 100 and 85 lbf.in (1.13 and 0.96 m.daN )

.
(k) Tap the coupling (2) retainer ring with the MALLET - SOFT FACE at several places around the perimeter.
(l) Do step 4.A.(2)(j) and step 4.A.(2)(k) again until no loss of torque occurs.
(m)

Turbine Active Clearance Control (ACC) Air Valve ** ON A/C NOT FOR ALL

(n) If the clearance is not uniform all around the perimeter of the valve disc, loosen the coupling (2) V-band nut and do step 4.A.(2)(f) thru step 4.A.(2)(m) again.
(o) Tighten the coupling (2) V-band nut until it secures the coupling (2) to the flange between the upper ACC inlet-duct and the valve (1).
(p) Do step 4.A.(2)(g) thru step 4.A.(2)(n) for the upper coupling (2).

PRE SB C73-00-0009A (Config-1 Initial Design Configuration)

(3) Connect the servo fuel tubes (CR11) and (CP11) to the ACC valve (1).

Turbine Active Clearance Control (ACC) Air Valve (Config-1 Initial Design Configuration) ** ON A/C NOT FOR ALL

(4) Torque the servo fuel tube (CR11) to the ACC valve (1) as follows:
(a) TORQUE the tube B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(b) Remove the wrench.
(c) Do not loosen the B-nut.
(d) TORQUE the tube B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(5) Torque the servo fuel tube (CP11) on the ACC valve (1) as follows:
(a) TORQUE the tube B-nut to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

.
(b) Remove the wrench.
(c) Do not loosen the B-nut.
(d) TORQUE the tube B-nut to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

.

END OF PRE SB C73-00-0009A (Config-1 Initial Design Configuration)

POST SB C73-00-0009A (Config-2 Assembly Durability Improvement Configuration)

(6) Connect the servo fuel tubes (CR26) and (CP26) to the ACC valve (1).

Turbine Active Clearance Control (ACC) Air Valve (Config-2 Case Assembly Durability Improvement Configuration) ** ON A/C NOT FOR ALL

(7) Torque the servo fuel tube (CR26) to the ACC valve (1) as follows:

(a) TORQUE the tube B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(b) Remove the wrench.
(c) Do not loosen the B-nut.
(d) TORQUE the tube B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(8) Torque the servo fuel tube (CP26) to the ACC valve (1) as follows:
(a) TORQUE the tube B-nut to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

(b) Remove the wrench.
(c) Do not loosen the B-nut.
(d) TORQUE the tube B-nut to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

END OF POST SB C73-00-0009A (Config-2 Assembly Durability Improvement Configuration)

(9) Connect the wiring harness to the ACC valve (1) as follows:
(a) Examine, align and engage the connector.
(b) While you tighten the coupling ring, push lightly inward on the connector.
(c) Use the PLIERS - JAWED, SOFT and tighten the connector against the receptacle.
(d) Make sure that you can feel the ratchet feature.
(e) While you tighten, push the connector in and from side to side.
(f) Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(g) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 75-24-01-410-050-A ** ON A/C NOT FOR ALL

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 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.

Subtask 75-24-01-440-050-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 75-24-01-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802).

Subtask 75-24-01-710-050-A ** ON A/C NOT FOR ALL

D. Test(s)
(1) Do the test No. 6 - Full Authority Digital Engine Control (FADEC) system idle test (Ref. AMM TASK 73-21-00-710-807).
(2) Do the test No. 15 - operation test (dry motor) of the engine actuators (Ref. AMM TASK 73-21-00-710-809).
(3) Do the test No. 3 - idle power test (Ref. AMM TASK 71-00-00-720-811).

[Rev.10 from 2021] 2026.04.01 03:12:57 UTC