Removal of the ACT Air Shut-Off Valve Actuator

TASK 28-28-56-000-001-A
Removal of the ACT Air Shut-Off Valve Actuator

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

FIN: 3QH ** ON A/C NOT FOR ALL

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 2M (6 FT)
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
151BC

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 25-55-11-000-002-A	Removal of the Ceiling Panels in the Aft Cargo-Compartment - FR47/FR59
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
ACT Air Shut-Off Valve Actuator

3. Job Set-up
Subtask 28-28-56-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(3) Put a WARNING NOTICE(S) in position:

the refuel/defuel panel 801VU,
the fuel panel 40VU,
to tell persons not to operate the refuel/defuel system.

Subtask 28-28-56-010-051-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(2) Put an ACCESS PLATFORM 2M (6 FT) in position at the opening of the aft cargo-compartment.
(3) In the aft cargo-compartment, remove the cargo-ceiling panel 151BC (Ref. AMM TASK 25-55-11-000-002).

Subtask 28-28-56-865-050-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	ACT1/REFUEL & SPLY	33QU	L29
121VU	FUEL/HI/LVL/SPLY	1QJ	L25
121VU	FUEL/RFL/DFL/SPLY	2QU	L24
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L23
121VU	ACT XFR VALVE MAN CTL	30QH	N29
121VU	ACT1/CTL & SPLY	9QH	P29
121VU	ACT PUMP SUPPLY	25QH	Q29

4. Procedure
Subtask 28-28-56-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Actuator of the ACT Air Shut-Off Valve
(1) Disconnect the electrical connector (1) from the receptacle (7).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Loosen the screw (6), then open and remove the V-clamp (3) from the actuator (2).
(4) Remove the actuator (2) from the air shut-off valve (4).
(5) Remove and discard the O-ring (5).

[Rev.10 from 2021] 2026.04.02 06:18:01 UTC