Replace the Rod End of the HP/LP Turbine ACC Air Valve - VRS1550 [IAE]

TASK 75-24-51-300-010-A
Replace the Rod End of the HP/LP Turbine ACC Air Valve - VRS1550

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

CAUTION: YOU MUST NOT DO THIS REPAIR TO A LOOSE ROD END OR TO A ROD END THAT HAS NOT BEEN INSTALLED BY APPROVED PROCEDURES. YOU CANNOT GET THE CORRECT INSTALLATION DIMENSION IF YOU DO THIS REPAIR TO THESE ROD ENDS. THIS CAN CAUSE DAMAGE TO THE ACC SYSTEM PARTS AND TO THE TURBINE SECTION.

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 30 and 22.5 lbf.in (0.34 and 0.25 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 70 and 60 lbf.in (0.79 and 0.68 m.daN )
No specific	Torque wrench: range to between 170 and 150 lbf.in (1.92 and 1.70 m.daN )
IAE3J13516	1	GAGE, SETTING

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V02-176)	lockwire

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. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	COTTER PIN	AIPC 75-24-51-80-110
9	PIN	AIPC 75-24-51-80-110

E. 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
Disconnection/Connection of the Stator Rod and the Actuator Rod
Installation of Setting Gage and Examination of Key Dimension
Replacement of the Rod End

3. Job Set-up
Subtask 75-24-51-941-053-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 75-24-51-010-054-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 75-24-51-040-051-A ** ON A/C NOT FOR ALL

C. Deactivate the thrust reverser.

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 75-24-51-010-053-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

4. Procedure
Subtask 75-24-51-020-053-A ** ON A/C NOT FOR ALL

A. Disconnect the actuator rod from the ACC air valve:

Disconnection/Connection of the Stator Rod and the Actuator Rod ** ON A/C NOT FOR ALL

(1) Remove and discard the cotter pin (3).
(2) Remove the nut (4) and the bolt (7) and release the actuator rod (5) from the ACC air valve.

Subtask 75-24-51-020-054-A ** ON A/C NOT FOR ALL

B. Disconnect the stator rod:

CAUTION: HOLD THE WEIGHT OF THE ACC AIR VALVE WHEN YOU DISCONNECT/CONNECT THE STATOR ROD FROM/TO THE VALVE TO PREVENT DAMAGE TO THE ACC SYSTEM PARTS.

(1) Disconnect the stator rod from the ACC air valve.

Disconnection/Connection of the Stator Rod and the Actuator Rod ** ON A/C NOT FOR ALL

(a) Remove and discard the cotter pin (9).
(b) Remove the nut (8), the two nuts (1) and the two bolts (2).
(2) Remove the assembly:

CAUTION: DO NOT REMOVE THE BUSH FROM THE HPT/LPT VALVE ACTUATOR CLEVIS WHEN YOU REMOVE THE ACTUATOR. IF YOU REMOVE THE BUSH YOU CANNOT GET THE CORRECT INSTALLATION DIMENSION OF THE ROD END. THIS CAN CAUSE DAMAGE TO THE ACC SYSTEM PARTS AND TO THE TURBINE SECTION.

(a) Remove the assembly of the rod bracket and the crank (10) from the ACC air valve and the stator rod (6) to release the stator rod from the ACC air valve.

Subtask 75-24-51-350-050-A ** ON A/C NOT FOR ALL

C. Measure dimension X.

Installation of Setting Gage and Examination of Key Dimension ** ON A/C NOT FOR ALL

(1) Install the IAE3J13516 GAGE, SETTING to the rod end and install the bush in the ACC air valve clevis.

NOTE: The IAE3J13516 GAGE, SETTING, is installed correctly when the pin marked "ROD" is installed to the rod end.

(2) Measure and write the dimension X.

NOTE: Use an average dimension if you get different values when you measure the dimension.

Subtask 75-24-51-350-051-A ** ON A/C NOT FOR ALL

D. Remove the rod:

CAUTION: HOLD THE ACC AIR VALVE WHEN YOU REMOVE/INSTALL THE ROD END TO PREVENT DAMAGE TO THE ACC SYSTEM PARTS.

CAUTION: USE AN APPLICABLE WRENCH ON THE FLAT END OF THE SHAFT TO HOLD THE SHAFT WHEN YOU INSTALL THE ROD END AND TORQUE THE NUT. IF THE SHAFT TURNS IT CAN CAUSE DAMAGE TO THE ACTUATOR.

(1) Remove the rod end from the ACC air valve.

Replacement of the Rod End ** ON A/C NOT FOR ALL

(a) Remove the lockwire from the nut (12) and loosen the nut until the key of the washer (11) becomes free from the shaft of the ACC air valve.
(b) Remove the rod end (13) from the ACC air valve.

Subtask 75-24-51-350-052-A ** ON A/C NOT FOR ALL

E. Prepare a new rod end for installation.

Replacement of the Rod End ** ON A/C NOT FOR ALL

(1) Install the nut (12) to the new rod end (13) and turn the nut until it reaches the thread end of the rod end.
(2) Install the washer (11).

CAUTION: MAKE SURE THE PROJECTION OF THE WASHER IS NOT TO THE BEARING BALL SIDE. IF THE DIRECTION OF THE WASHER IS NOT CORRECT, THE ROD END CAN BE LOOSE.

(a) Align the key of the washer (11) to the groove of the rod end (13) and install the washer to the rod end.

Subtask 75-24-51-350-053-A ** ON A/C NOT FOR ALL

F. Install the rod end:

CAUTION: HOLD THE ACC AIR VALVE WHEN YOU REMOVE/INSTALL THE ROD END TO PREVENT DAMAGE TO THE ACC SYSTEM PARTS.

CAUTION: USE AN APPLICABLE WRENCH ON THE FLAT END OF THE SHAFT TO HOLD THE SHAFT WHEN YOU INSTALL THE ROD END AND TORQUE THE NUT. IF THE SHAFT TURNS IT CAN CAUSE DAMAGE TO THE ACTUATOR.

(1) Install the new rod end to the ACC air valve.

Replacement of the Rod End ** ON A/C NOT FOR ALL

(a) Install the rod end (13) and the washer (11) to the ACC air valve.
(b) Approximately set the dimension Y to the dimension X that you wrote before.
(2) Align the washer (11) with the valve shaft.

CAUTION: MAKE SURE THAT THE BUSH IS INSTALLAED IN THE ACC ACTUATOR CLEVIS. IF THE BUSH IS NOT THERE YOU CANNOT GET THE CORRECT INSTALLATION DIMENSION OF THE ROD END. THIS CAN CAUSE DAMAGE TO THE ACC SYSTEM PARTS AND TO THE TURBINE SECTION.

(a) Find a position where the key of the washer (11) aligns with one of two grooves in the valve shaft and the IAE3J13516 GAGE, SETTING can be installed to the rod end and the bush installed in the ACC air valve clevis. Turn the rod end (13) and install the IAE3J13516 GAGE, SETTING to do this.

NOTE: The IAE3J13516 GAGE, SETTING, is installed correctly when the pin marked "ROD" is installed to the rod end.

(3) Remove the setting gage.
(4) Hand tighten the nut (12).
(5) TORQUE the nut (12) to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

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

Subtask 75-24-51-350-054-A ** ON A/C NOT FOR ALL

G. Adjust the rod and installation dimension.

CAUTION: HOLD THE WEIGHT OF THE ACC AIR VALVE WHEN YOU DISCONNECT/CONNECT THE STATOR ROD FROM/TO THE VALVE TO PREVENT DAMAGE TO THE ACC SYSTEM PARTS.

CAUTION: USE AN APPLICABLE WRENCH ON THE FLAT END OF THE SHAFT TO HOLD THE SHAFT WHEN YOU INSTALL THE ROD END AND TORQUE THE NUT. IF THE SHAFT TURNS IT CAN CAUSE DAMAGE TO THE ACTUATOR.

(1) Adjust the rod end installation dimension.

Replacement of the Rod End ** ON A/C NOT FOR ALL

(a) Install the IAE3J13516 GAGE, SETTING to the rod end and the bush installed in the ACC air valve clevis.

NOTE: The IAE3J13516 GAGE, SETTING, is installed correctly when the pin marked "ROD" is installed to the rod end.

(b) Measure the dimension Z.

Replacement of the Rod End ** ON A/C NOT FOR ALL

1 If the dimension Z is within the range between Dimension X minus 0.011 in. (0.28 mm) and dimension X plus 0.011 in. (0.28 mm) continue this procedure at (3).
2 If the dimension Z is less than Dimension X minus 0.011 in. (0.28 mm).
a Remove the IAE3J13516 GAGE, SETTING.
b Loosen the nut (12) and turn the rod end (13) 180 degrees in a clockwise direction.
c Hand tighten the nut (12).
d TORQUE the nut (12) to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
e Do steps (1) and (2) again.
3 If the dimension Z is greater than Dimension X plus 0.011 in. (0.28 mm).
a Remove the IAE3J13516 GAGE, SETTING.
b Loosen the nut and turn the rod end 180 degrees in a counter clockwise direction.
c Hand tighten the nut (12).
d TORQUE the nut (12) to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
e Do steps (a) and (b) again.
4 Remove the IAE3J13516 GAGE, SETTING.
5 Safety the nut (12) with lockwire (Material No.V02-176) (Ref. AMM TASK 70-40-11-911-014).

Subtask 75-24-51-420-052-A ** ON A/C NOT FOR ALL

H. Connect the stator rod:

CAUTION: HOLD THE WEIGHT OF THE ACC AIR VALVE WHEN YOU DISCONNECT/CONNECT THE STATOR ROD FROM/TO THE VALVE TO PREVENT DAMAGE TO THE ACC SYSTEM PARTS.

(1) Connect the stator rod to the ACC air valve.

Disconnection/Connection of the Stator Rod and the Actuator Rod ** ON A/C NOT FOR ALL

(a) Position and align the holes of the ACC air valve and stator rod (6).
(b) Install the assembly of the rod bracket assembly and the crank (10) to the ACC air valve and the stator rod (6).
(c) Hand tighten the nut (8).
(d) Install the rod bracket assembly and the crank (10) on the turbine case flange with two bolts (2) and nuts (1).
(e) TORQUE the nuts (1) to between 170 and 150 lbf.in (1.92 and 1.70 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(f) TORQUE the nut (8) to between 42.5 and 32.5 lbf.in (0.48 and 0.37 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(g) Safety the nut with a new AIPC 75-24-51-80-110 PIN (9) (Ref. AMM TASK 70-40-11-911-014).

Subtask 75-24-51-420-053-A ** ON A/C NOT FOR ALL

I. Connect the actuator rod to the ACC air valve.

Disconnection/Connection of the Stator Rod and the Actuator Rod ** ON A/C NOT FOR ALL

(1) Position and align the holes of the rod end of ACC air valve and actuator rod (5).
(2) Install the bolt (7) and the nut (4).
(3) TORQUE the nut (4) to between 30 and 22.5 lbf.in (0.34 and 0.25 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(4) Safety the nut with a new AIPC 75-24-51-80-110 COTTER PIN (3) (Ref. AMM TASK 70-40-11-911-014).

5. Close-up
Subtask 75-24-51-410-053-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 75-24-51-440-050-A ** ON A/C NOT FOR ALL

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

Subtask 75-24-51-410-052-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).

[Rev.10 from 2021] 2026.04.01 03:11:37 UTC