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

TASK 75-24-49-400-802-A
Installation of the Turbine Active Clearance Control (ACC) Ducts

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE 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.

1. Reason for the Job
Use this procedure to install the ACC ducts.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	MALLET - SOFT FACE
No specific	Torque wrench: range to between 18 and 14.58 lbf.in (0.20 and 0.16 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 100 and 90 lbf.in (1.13 and 1.02 m.daN )
No specific	Torque wrench: range to between 195 and 175 lbf.in (2.20 and 1.98 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	lubricant, aircraft turbine engine
(Material No.P06-053)	Sealing Ring Lubricant
(Material No.P06-054)	Antigalling Compound
(Material No.P09-014)	sealant, silicone rubber

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	PACKING	EIPC 75-24-49-01-010

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-27-00-910-810-A	PWA 83 - Cleaning of Parts Before Adhesive Bonding, Sealing or Filling
TASK 71-00-00-790-802-A	Test No. 1 - Pneumatic Leak Test
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
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 75-24-01-400-801-A	Installation of the Turbine Active Clearance Control (ACC) Air Valve
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) Ducts

3. Job Set-up
Subtask 75-24-49-941-062-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833)

Subtask 75-24-49-010-070-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 2M (6 FT) - ADJUSTABLE is in position.

Subtask 75-24-49-040-059-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 75-24-49-010-071-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 75-24-49-420-081-A ** ON A/C NOT FOR ALL

A. Installation of the Turbine Active Clearance Control (ACC) Ducts

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

(1) Removal of the protection covers

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

(a) Make sure that remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Install the ACC duct (AD04) (1) to the ACC valve and manifolds as follows: See the sheet 1 of the figure.
(a) Clean the ACC manifold perimeters (Ref. AMM TASK 70-27-00-910-810): See sheet 3 of the figure.
(b) Apply the P09-014sealant, silicone rubber to the ACC manifold perimeters. Refer to PWSPM-D-70-48-00-05A-621A-D.
(c) Install the coupling (4) and a new EIPC 75-24-49-01-010 PACKING (3) to the tube if necessary, as follows:
1 Apply P03-001lubricant, aircraft turbine engine or Sealing Ring Lubricant (Material No.P06-053) to the packing (3).
2 Install the packing (3) to the tube tab.
3 Install the coupling (4) to the tube and packing (3).
(d) Apply P03-001lubricant, aircraft turbine engine or Sealing Ring Lubricant (Material No.P06-053) to a new EIPC 75-24-49-01-010 PACKING (3).
(e) Install the packing (3) to the ACC duct (AD04) (1) tab.
(f) Align and install the ACC duct (AD04) (1) on the ACC manifold between the coupling (4) and the ACC valve.
(g) Make sure that the two tabs on the tube and ACC duct (AD04) (1) fully engage and safety the two packings (3) and coupling (4).
(h) Apply Antigalling Compound (Material No.P06-054) to the threads of the clamp (2) bolt and the four bolts (5).

NOTE: For new or refurbished bolts or nuts with baked-on lubricant, do not do the wet application.

(i) Install the four bolts (5) on the duct (AD04) (1) and the ACC manifold finger-tight.
(j) Torque the clamp (2) as follows:
1 TORQUE the clamp (2) to between 100 and 85 lbf.in (1.13 and 0.96 m.daN )

.
2 Tap the clamp (2) lightly with a MALLET - SOFT FACE at several places around perimeter.
3 TORQUE the clamp (2) again to between 100 and 85 lbf.in (1.13 and 0.96 m.daN )

.
(k) TORQUE the four bolts (5) to between 100 and 90 lbf.in (1.13 and 1.02 m.daN )

.
(l) Clean all excess RTV after assembly of the duct (AD04) (1) from the bead formed along the seam of the hardware.
(m) Allow the RTV to cure. Refer to PWSPM-D-70-48-00-05A-621A-D.
(3) Install the ACC valve (Ref. AMM TASK 75-24-01-400-801).
(4) Install the duct (AD03) (14) on the ACC valve as follows: See the sheet 2 of the figure.
(a) Apply Antigalling Compound (Material No.P06-054) to the threads of the clamp (16) bolt and the two bolts (15).

NOTE: For new or refurbished bolts or nuts with baked-on lubricant, do not do the wet application.

(b) Align and install the duct (AD03) (14) on the ACC valve and cooling air tube with the clamps (16) and (18) finger-tight.
(c) Attach the connecting links to the duct (AD03) (14) with the two nuts (17) and bolts (15) finger-tight.
(d) Torque the clamp (16) as follows:
1 TORQUE the clamp (16) to between 100 and 85 lbf.in (1.13 and 0.96 m.daN )

.
2 Tap the clamp (16) lightly with a MALLET - SOFT FACE at several places around the perimeter.
3 TORQUE the clamp (16) again to between 100 and 85 lbf.in (1.13 and 0.96 m.daN )

.
(e) TORQUE the clamp (18) to between 18 and 14.58 lbf.in (0.20 and 0.16 m.daN )

.
(f) TORQUE the two nuts (17) to between 195 and 175 lbf.in (2.20 and 1.98 m.daN )

5. Close-up
Subtask 75-24-49-010-072-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 right thrust reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR

Subtask 75-24-49-040-060-A ** ON A/C NOT FOR ALL

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

Subtask 75-24-49-010-073-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).

Subtask 75-24-49-710-050-A ** ON A/C NOT FOR ALL

D. Test
(1) Do the test No. 1 - Pneumatic Leak Test (Ref. AMM TASK 71-00-00-790-802).

[Rev.10 from 2021] 2026.04.01 03:13:03 UTC