Removal of the APU Hoist Tool

TASK 49-00-00-080-003-A
Removal of the APU Hoist Tool

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

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

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 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-11-11-400-004-A	Installation of the Power Plant (APU) (131-9(A))
TASK 49-52-41-000-003-A	Removal of the Oil-Cooler Outlet-Duct (131-9(A))
TASK 49-52-41-400-003-A	Installation of the Oil-Cooler Outlet-Duct (131-9(A))
TASK 52-41-00-010-001-A	Open the APU Doors for Access
TASK 52-41-00-410-001-A	Close the APU Doors after Access
APU Hoist Installation

3. Job Set-up
Subtask 49-00-00-860-086-A ** ON A/C NOT FOR ALL

A. 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 is OFF.
(3) Make sure that the warning notices are on panel 25VU 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).
(5) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the access doors 315AL and 316AR.
(6) Make sure that the APU access doors 315AL and 316AR are open (Ref. AMM TASK 52-41-00-010-001).
(7) Make sure that the LIGHT SW 11LJ is set to ON.
(8) Make sure that the oil-cooler outlet duct is removed (Ref. AMM TASK 49-52-41-000-003).

Subtask 49-00-00-865-096-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38
121VU	APU/FIRE/LP VALVE/NORM	4WF	M42
121VU	APU/FIRE/LP VALVE/STBY	3WF	M41

4. Procedure

WARNING: OBEY THE HOISTING SAFETY PROCEDURES. MAKE SURE THAT THE HOIST IS ASSEMBLED AND ATTACHED CORRECTLY BEFORE YOU PUT A LOAD ON IT. OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THE HOIST. IF THE HOIST IS IN AN INCORRECT CONDITION THE LOAD CAN MOVE ACCIDENTALLY AND KILL PERSONS OR CAUSE INJURY.

CAUTION: MAKE SURE THAT THE THREE ATTACHMENT NUTS ARE INSTALLED AND CORRECTLY TORQUED BEFORE YOU DISCONNECT THE HOIST. IF YOU DO NOT DO THIS, YOU CAN CAUSE DAMAGE TO THE TIE RODS.

Subtask 49-00-00-080-053-A ** ON A/C NOT FOR ALL

A. Removal of the A1-91-265 HOIST-MINILIFT

APU Hoist Installation ** ON A/C NOT FOR ALL

(1) Make sure that the APU is correctly installed and the APU mount nuts are correctly torqued (Ref. AMM TASK 49-11-11-400-004).
(2) Disconnection of the A1-91-265 HOIST-MINILIFT from the APU

NOTE: Remove the Mini-Hoist Lift carefully. If you do not, you can cause damage to the Exit-Fan Duct Assembly of the Oil Cooler.

(a) Turn the upper drum shaft of the A1-91-265 HOIST-MINILIFT (10) in a counterclockwise direction until you have removed the tension from the cable (3).
(b) Remove the quick release pin (5) and disconnect the shackle assembly (4) from the circular hole of the adapter of the APU (9).
(c) Disconnect the shackle assembly (4) from the cable (3) of the A1-91-265 HOIST-MINILIFT (10).
(3) Removal of the A1-91-265 HOIST-MINILIFT from the APU compartment
(a) Hold the A1-91-265 HOIST-MINILIFT (10) in position. Then remove the quick release pin (8) from the bearing assy (7) on the LH side of the APU compartment.
(b) Hold the A1-91-265 HOIST-MINILIFT (10) in position. Then remove the quick release pin (2) from the APU hoist bracket (1) on the top firewall of the APU compartment.
(c) Remove the A1-91-265 HOIST-MINILIFT (10) from the APU compartment.
(d) Install the quick release pins (2) and (8) temporarily on the A1-91-265 HOIST-MINILIFT (10).

5. Close-up
Subtask 49-00-00-410-068-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Install the APU oil cooler outlet-duct (Ref. AMM TASK 49-52-41-400-003)
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Set the LIGHT SW 11LJ to the OFF position.
(4) Close the APU access doors 315AL, 316AR (Ref. AMM TASK 52-41-00-410-001).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(6) Remove the access platform(s).

Subtask 49-00-00-865-097-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close 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
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38
121VU	APU/FIRE/LP VALVE/NORM	4WF	M42
121VU	APU/FIRE/LP VALVE/STBY	3WF	M41

Subtask 49-00-00-860-087-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Put the related hydraulic system in the pressurized configuration. (Ref. AMM TASK 29-00-00-864-001).
(2) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:42:20 UTC