Removal of the Inlet Guide Vane - Actuator (131-9(A))

TASK 49-23-51-000-004-A
Removal of the Inlet Guide Vane - Actuator (131-9(A))

WARNING: DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

WARNING: MAKE SURE THAT YOU HAVE THE CORRECT FIRE FIGHTING EQUIPMENT AVAILABLE.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	CONTAINER 3 L(3/4 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 52-41-00-010-001-A	Open the APU Doors for Access
Actuator - Inlet Guide Vanes ** ON A/C NOT FOR ALL
Actuator - Inlet Guide Vanes ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 49-23-51-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Obey the Fuel Safety Precautions (Ref. AMM TASK 28-00-00-910-001).

Subtask 49-23-51-860-057-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(2) On the panel 25VU, make sure that the APU MASTER SW p/bsw OFF.
(3) Put a warning notice in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).

Subtask 49-23-51-865-063-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-23-51-010-058-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the APU access doors 315AL and 316AR.
(2) Open the APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the LIGHT control SW 11LJ to the ON position.

4. Procedure
Subtask 49-23-51-020-057-A ** ON A/C NOT FOR ALL

A. Removal of the Inlet Guide Vane (IGV) - Actuator
(1) Disconnect the electrical connection (6).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Put the CONTAINER 3 L(3/4 USGAL) in position below the IGV actuator (5).
(4) Loosen the captive bolts (1).
(5) Turn the captive plate (2) to release the fuel pipes (3) and (16).
(6) Disconnect the fuel pipes (3), (16) and (18) from the IGV actuator (5).
(7) Remove and discard the O-rings (4), (15) and (17).
(8) Put the PLUG-BLANKING in each disconnected line end.
(9) Loosen the bolts (9) and turn the cover (11).
(10) Remove the captive bolt (10) and the washer (14) to disconnect the rod end (7) from the IGV actuation rod (8).
(11) Remove the bolts (13) and the washers (12).
(12) Remove the IGV actuator (5) from the APU.
(13) Remove the rod end (7) from the IGV actuator (5).

Subtask 49-23-51-020-057-B ** ON A/C NOT FOR ALL

A. Removal of the Inlet Guide Vane (IGV) - Actuator
(1) Disconnect the electrical connection (6).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Put the CONTAINER 3 L(3/4 USGAL) in position below the IGV actuator (5).
(4) Remove the bolts (1).
(5) Turn the captive plate (2) to release the fuel pipes (3) and (16).
(6) Disconnect the fuel pipes (3), (16) and (18) from the IGV actuator (5).
(7) Remove and discard the O-rings (4), (15) and (17).
(8) Put the PLUG-BLANKING in each disconnected line end.
(9) Loosen the bolts (9) and turn the cover (11).
(10) Remove the captive bolt (10) and the washer (14) to disconnect the rod end (7) from the IGV actuation rod (8).
(11) Remove the bolts (13) and the washers (12).
(12) Remove the IGV actuator (5) from the APU.
(13) Remove the rod end (7) from the IGV actuator (5).

[Rev.10 from 2021] 2026.04.01 12:41:47 UTC