Installation of the Actuator - Engine Pump Fire-Valve

TASK 29-11-52-400-002-A
Installation of the Actuator - Engine Pump Fire-Valve

WARNING: MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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	SAFETY BARRIER(S)
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
574AB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
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 29-10-00-720-001-A	Functional Check of Hydraulic Fire Shut-Off Valves
TASK 29-10-00-720-802-A	Functional Check of Hydraulic Fire Shut-Off Valves
TASK 29-10-00-863-001-A	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-863-001-A	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
Actuator - Engine Pump Fire-Valve (1046GK)

3. Job Set-up
Subtask 29-11-52-941-061-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) Make sure that the SAFETY BARRIER(S) are in position.
(3) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the Green Hydraulic system.

Subtask 29-11-52-860-051-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that Green Hydraulic system is depressurized (Ref. AMM TASK 29-00-00-864-001).
(2) Make sure that the applicable hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT) is in position.
(4) Make sure that the access panel 574AB is open.

Subtask 29-11-52-860-051-B ** ON A/C NOT FOR ALL

Subtask 29-11-52-865-056-A

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

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

4. Procedure
Subtask 29-11-52-420-055-A

A. Preparation for Installation

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

(1) Clean the component interfaces and the adjacent areas with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Remove the blanking caps from the electrical connectors.

Subtask 29-11-52-420-053-B

B. Installation of the Actuator of the Engine Pump Fire-Valve

CAUTION: MAKE SURE THAT THE ACTUATOR AND THE ENGINE PUMP FIRE VALVE TOUCH ACROSS THEIR FULL SURFACES AND CORRECTLY CONNECT WITH :

THE DRIVE SHAFT OF THE ACTUATOR ENGAGED IN THE COUPLING OF THE ENGINE PUMP FIRE VALVE
THE DOWEL PIN IN THE ADAPTOR PLATE ENGAGED WITH THE HOLE IN THE ACTUATOR ASSEMBLY.

(1) Remove the blanking covers from the actuator (1) and the adaptor plate (5).
(2) Align the actuator (1) with the pin (6), and put the actuator (1) in position on the adaptor plate (5).
(3) Make sure that the drive shaft of the actuator engages the engine pump fire-valve correctly.
(4) Install the screws (4) into the clamp half (3), and install the new O-rings (2) onto the screws (4).
(5) Put the clamp halves (3) and (7) in position on the actuator assembly (1) and the adaptor plate (5).
(6) Install the screws (4) into the clamp half (7).
(7) Put the bonding strap (9) in position on the actuator (1), and install the screw (10) (Ref. AMM TASK 20-28-00-912-802).
(8) Remove the blanking caps and connect the electrical connector (8).

Subtask 29-11-52-865-057-A

C. Remove the safety clip(s) and the tag(s) and close 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 29-11-52-863-053-A

D. Pressurize the 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) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001) or (Ref. AMM TASK 29-23-00-863-001).

Subtask 29-11-52-720-052-A ** ON A/C NOT FOR ALL

E. Test
(1) Do a functional test of the engine pump fire-valve (Ref. AMM TASK 29-10-00-720-001).

Subtask 29-11-52-720-052-B ** ON A/C NOT FOR ALL

E. Test
(1) Do a functional test of the engine pump fire-valve (Ref. AMM TASK 29-10-00-720-802).

Subtask 29-11-52-864-053-A

F. 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 29-10-00-864-001) or (Ref. AMM TASK 29-23-00-864-001).

5. Close-up
Subtask 29-11-52-410-052-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access panel 574AB.

Subtask 29-11-52-410-052-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 574AB.

Subtask 29-11-52-942-055-A

B. Remove of Equipment
(1) Remove the SAFETY BARRIER(S).
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:18:39 UTC