Removal of the Actuator - Engine Pump Fire-Valve

TASK 29-11-52-000-002-A
Removal of the Actuator - Engine Pump Fire-Valve

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

FIN: 1046GK

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 3M (10 FT)
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
574AB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
Actuator - Engine Pump Fire-Valve (1046GK)

3. Job Set-up
Subtask 29-11-52-941-057-A

A. Safety Precautions

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) You must obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002) when you do work on the hydraulic system.
(2) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.
(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 29-11-52-864-051-A

B. Depressurize the Applicable Hydraulic Systems

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Depressurize the Green Hydraulic system (Ref. AMM TASK 29-00-00-864-001).
(2) Depressurize the Green Hydraulic system reservoir (Ref. AMM TASK 29-14-00-614-001).

Subtask 29-11-52-865-055-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/FIRE VALVE/G/ENG1	1703GK	C13
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 29-11-52-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) in position, below zone 574.
(2) Open the access panel 574AB.

Subtask 29-11-52-010-053-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) in position, below zone 574.
(2) Remove the access panel 574AB.

4. Procedure
Subtask 29-11-52-020-051-B

A. Removal of the Actuator from the Engine Pump Fire-Valve
(1) Disconnect the electrical connector (8).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the screw (10) and disconnect the bonding strap (9) from the actuator (1).
(4) Loosen the screws (4) sufficiently to remove the clamp halves (3) and (7) from the actuator (1). Remove and discard the O-rings (2).
(5) Remove the actuator (1), from the adaptor plate (5).
(6) Put blanking covers on the openings of the adaptor plate (5), and the actuator (1).

[Rev.10 from 2021] 2026.04.01 00:18:38 UTC