Removal of the Bleed Valve and Ballscrew Actuator Assembly [CFMB]

TASK 75-31-60-000-002-A
Removal of the Bleed Valve and Ballscrew Actuator Assembly

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	WARNING NOTICE(S)

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. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 72-23-00-000-027-A	Removal of the Fan Duct Panels
TASK 75-31-20-820-001-A	Set the Variable Bleed Valve Assembly to the Closed position
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
Bleed Valve and Ballscrew Actuator Assembly

3. Job Set-up
Subtask 75-31-60-941-052-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 75-31-60-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 75-31-60-040-052-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 75-31-60-010-056-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 75-31-60-010-053-A ** ON A/C NOT FOR ALL

A. Remove the fan duct panel corresponding to the Variable Bleed Valve (VBV) door to be removed, and the 2 adjacent panels (Ref. AMM TASK 72-23-00-000-027).

Subtask 75-31-60-820-055-A ** ON A/C NOT FOR ALL

B. Set the VBV to the CLOSED position (Ref. AMM TASK 75-31-20-820-001).

Subtask 75-31-60-020-051-A ** ON A/C NOT FOR ALL

C. Removal of the Bleed Valve and Ballscrew Actuator Assembly
(1) Remove flexible shaft (10) as follows:
(a) Push the flexible shaft clockwise to compress the spring, and disengage the opposite end from the VBV actuator.
(b) Remove the flexible shaft from the strut.
(2) Loosen the 2 upper horizontal (40) and the 2 lower vertical (30) captive bolts attaching bleed valve and ballscrew actuator (20) and remove assembly.

[Rev.10 from 2021] 2026.04.01 03:10:47 UTC