Removal of the Engine Pump Fire-Valve

TASK 29-11-52-000-001-A
Removal of the 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	1	CONTAINER 1 L (1/4 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
574AB, 574BB

D. 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
Engine Pump Fire-Valve (1046GK) ** ON A/C NOT FOR ALL
Engine Pump Fire-Valve (1046GK) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 29-11-52-941-050-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) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(3) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.

Subtask 29-11-52-864-050-A

B. Depressurize the Applicable Hydraulic System

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 29-11-52-865-050-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 29-11-52-010-050-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) below zone 574.
(2) Open the access panels 574AB 574BB.
(3) Put clean Textile-Lint free Cotton - (Material No.14SBA1) below the engine pump fire valve (5).
(4) Put a CONTAINER 1 L (1/4 USGAL) below the access door opening, to collect the hydraulic fluid.

Subtask 29-11-52-010-050-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) below zone 574.
(2) Remove the access panels 574AB 574BB.
(3) Put clean Textile-Lint free Cotton - (Material No.14SBA1) below the engine pump fire valve (5).
(4) Put a CONTAINER 1 L (1/4 USGAL) below the access door opening, to collect the hydraulic fluid.

4. Procedure
Subtask 29-11-52-020-050-A

A. Removal of the Engine Pump Fire-Valve
(1) Disconnect the cable connector (1) from the electrical connector (2).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Hold the engine pump fire-valve (5) and disconnect the coupling-nuts (6) and (3).
(4) Compress the compensated slide (4) to decrease its length. Remove the engine pump fire-valve (5).
(5) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.01 00:18:36 UTC