Installation of the HPT/LPT ACC Air Valve [IAE]

TASK 75-24-51-400-010-B
Installation of the HPT/LPT ACC Air Valve

1. Reason for the Job
This task gives the procedure for the installation of the HPT/LPT ACC air valve.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 30.0 and 22.5 lbf.in (0.34 and 0.25 m.daN )
No specific	Torque wrench: range to between 26 and 23 lbf.in (0.29 and 0.26 m.daN )
No specific	Torque wrench: range to between 42.5 and 32.5 lbf.in (0.48 and 0.37 m.daN )
No specific	Torque wrench: range to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )
No specific	Torque wrench: range to between 60 and 54 lbf.in (0.68 and 0.61 m.daN )
No specific	Torque wrench: range to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )
No specific	Torque wrench: range to between 170 and 150 lbf.in (1.92 and 1.70 m.daN )
No specific	Torque wrench: range to between 200 and 180 lbf.in (2.26 and 2.03 m.daN )

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. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
32	PIN	AIPC 75-24-51-80-110
33	PIN	AIPC 75-24-51-80-110
43	PIN	AIPC 75-24-51-80-110
49	PIN	AIPC 75-24-51-80-110
57	PIN	AIPC 75-24-51-80-110
82	PIN	AIPC 75-24-51-80-110

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-40-11-911-014-A	Locking Devices General Information
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
Active Clearance Control Valve
Active Clearance Control Valve
Active Clearance Control Valve

3. Job Set-up
Subtask 75-24-51-860-051-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 2M (6 FT) - ADJUSTABLE is in position.

Subtask 75-24-51-010-059-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-010)
(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 78-32-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 75-24-51-040-055-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated: (Ref. AMM TASK 78-30-00-040-012)

Subtask 75-24-51-630-051-A ** ON A/C NOT FOR ALL

D. Remove all covers from the openings.

4. Procedure
Subtask 75-24-51-420-073-A ** ON A/C NOT FOR ALL

A. Install the HPT/LPT ACC Air Valve:
(1) Install the ACC front duct to the HPT/LPT ACC air valve.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Install the ACC front duct (24) to the front flange of the HPT/LPT ACC air valve (5).
(b) Install the 12 bolts (23) and the 12 nuts (25).
(c) TORQUE the twelve nuts (25) to between 60 and 54 lbf.in (0.68 and 0.61 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(2) Assemble the ACC housing and related parts.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Assemble the ACC seal (41), the ACC seal retainer (42) and the joint heat shield (39) to the ACC housing (40).
(b) Install the four bolts (38).
(c) TORQUE the four bolts (38) to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(d) Install the bushes (45) and (64) in to the ACC housing (40).
(e) Put the ACC HPT valve link (53) in to position so that the bearing ball of the ACC HPT valve link (53) is between the bushes (45) and (64).
Make sure that the bushes (45) and (64) touch the faces of the bearing ball.
(f) Install the bolt (63) and the nut (44).
(g) TORQUE the nut (44) to between 42.5 and 32.5 lbf.in (0.48 and 0.37 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(h) Safety the nut (44) with a new AIPC 75-24-51-80-110 PIN (43) (Ref. AMM TASK 70-40-11-911-014).
(i) Install the bushes (48) and (66) in to the ACC housing (78).
(j) Put the ACC HPT valve link (56) in to position so that the bearing ball of the ACC HPT valve link (56) is between the bushes (48) and (66). Make sure that the bushes (48) and (66) touch the faces of the bearing ball.
(k) Install the bolt (65) and the nut (47).
(l) TORQUE the nut (47) to between 42.5 and 32.5 lbf.in (0.48 and 0.37 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(m) Safety the nut (47) with a new AIPC 75-24-51-80-110 PIN (82) (Ref. AMM TASK 70-40-11-911-014).
(n) Install the bushes (51) and (54) in to the ACC HPT valve link (89).
(o) Put the ACC HPT valve bracket (52) in to position so that the bearing ball of the ACC HPT valve bracket (52) is between the bushes (51) and (54). Make sure that the bushes (51) and (54) touch the faces of the bearing ball.
(p) Install the bolt (55) and the nut (50).
(q) TORQUE the nut (50) to between 42.5 and 32.5 lbf.in (0.48 and 0.37 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(r) Safety the nut (50) with a new AIPC 75-24-51-80-110 PIN (49) (Ref. AMM TASK 70-40-11-911-014).
(s) Install the bushes (59) and (61) in to the ACC HPT valve bracket (96).
(t) Put the ACC HPT valve bracket (60) in to position so that bearing ball of the ACC HPT valve link (56) is between the bushes (59) and (61). Make sure that the bushes (59) and (61) touch the faces of the bearing ball.
(u) Install the bolt (62) and the nut (58).
(v) TORQUE the nut (58) to between 42.5 and 32.5 lbf.in (0.48 and 0.37 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(w) Safety the nut (58) with a new AIPC 75-24-51-80-110 PIN (57) (Ref. AMM TASK 70-40-11-911-014).
(3) Install the ACC housing and related parts to the HPT/LPT ACC air valve.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Install the ACC housing and related parts to the HPT valve rear flange of the HPT/LPT ACC air valve (5) and attach it with the five bolts (3).
(b) TORQUE the five bolts (3) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(4) Install the ACC rear duct assembly to the HPT/LPT ACC air valve.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Install the ACC rear duct assembly (8) to the rear flanges of the HPT/LPT ACC air valve (5).
(b) Install the four bolts (7) and the four nuts (6).
(c) TORQUE the four nuts (6) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(5) Install the heat shield assembly to the HPT/LPT ACC air valve.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Put the heat shield assembly (28) and the clamps (20) and (21) in position on the HPT/LPT ACC air valve (5) and attach them with the two bolts (22) and the two nuts (29).
(b) Install the four bolts (26) and the four nuts (27).
(c) TORQUE the two nuts (29) and the four nuts (27) to between 26 and 23 lbf.in (0.29 and 0.26 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

Subtask 75-24-51-420-055-A ** ON A/C NOT FOR ALL

B. Install the HPT/LPT ACC Air Valve and Related Parts to the Engine.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(1) Extract the valve rod until the HPT valve vane is in the fully open position.
(2) Install the HPT/LPT ACC air valve:

CAUTION: LOOK THROUGH THE VALVE BODY FROM THE FRONT SIDE TO MAKE SURE THAT THE ACC SEAL STAYS IN POSITION WHILE YOU INSTALL THE HPT/ LPT ACC AIR VALVE TO THE TURBINE CLG MANIFOLD ASSEMBLY.

CAUTION: TO PREVENT DAMAGE TO THE SEALS, MAKE SURE THAT THE ACC SEAL AND THE LPT MANIFOLD PERISEAL ARE IN THEIR CORRECT POSITIONS.

(a) Install the HPT/LPT ACC air valve (5) to the turbine CLG manifold assembly and the LP turbine cooling manifold. Move the position of the ACC spherical joint assembly (41), as necessary, to connect the valve to the manifold.

Subtask 75-24-51-420-074-A ** ON A/C NOT FOR ALL

C. Install the HPT/LPT ACC Air Valve:
(1) Install the LPT valve rear flange of the HPT/LPT ACC air valve to the ACC valve bracket assembly on flange FM.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Install the LPT valve rear flange of the HPT/LPT ACC air valve (5) to the ACC valve bracket assembly (1) on flange FM and attach it with the two bolts (10) and the two nuts (4).
(b) TORQUE the two nuts (4) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(2) Install the ACC HPT valve bracket to the flange FM.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Install the ACC HPT valve bracket (52) to the flange FM and attach it with the two bolts (11) and the two nuts (2).
(b) TORQUE the two nuts (2) to between 200 and 180 lbf.in (2.26 and 2.03 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(3) Connect the rod of the HPT/LPT ACC air valve and the stator rod assembly to the ACC valve rod bracket on the turbine case flange.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Put the ACC rod bracket (37) in position on the turbine case flange and attach it with the two bolts (13) and the two nuts (36).
(b) TORQUE the two nuts (36) to between 170 and 150 lbf.in (1.92 and 1.70 m.daN )

.
(c) Install the bushes (19) and (30) to the rod of the HPT/LPT ACC air valve (5).
(d) Connect the rod of the HPT/LPT ACC air valve (5) and the stator rod assembly (15) to the ACC valve rod bracket (37) with the bolt (18) and the nut (31).
(e) TORQUE the nut (31) to between 42.5 and 32.5 lbf.in (0.48 and 0.37 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(f) Safety the nut (31) with a new AIPC 75-24-51-80-110 PIN (32).
(4) Install the ACC HPT valve bracket to the flange FM.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Attach the ACC HPT valve bracket (60) to the flange FM with the two bolts (12) and the two nuts (9).
(b) TORQUE the two nuts (9) to between 200 and 180 lbf.in (2.26 and 2.03 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(5) Connect the actuator rod assembly to the HPT/LPT ACC air valve.

Active Clearance Control Valve ** ON A/C NOT FOR ALL

(a) Install the bushes (17) and (35) to the actuator rod assembly (14).
(b) Retract the valve rod to a position where the actuator rod assembly (14) can be connected.
(c) Connect the actuator rod assembly (14) to the HPT/LPT ACC air valve (5) with the bolt (16) and the nut (34).
(d) TORQUE the nut (34) to between 30.0 and 22.5 lbf.in (0.34 and 0.25 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(e) Safety the nut (34) with a new AIPC 75-24-51-80-110 PIN (33) (Ref. AMM TASK 70-40-11-911-014).

5. Close-up
Subtask 75-24-51-410-056-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 halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 75-24-51-440-053-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 75-24-51-410-057-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(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).

[Rev.10 from 2021] 2026.04.01 13:00:42 UTC