Removal of the ACT Vent Shut-off Valve Actuator

TASK 28-28-55-000-001-A
Removal of the ACT Vent Shut-off Valve Actuator

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

FIN: 4QH1 ** ON A/C NOT FOR ALL
FIN: 4QH2 ** 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	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-11-27-000-001-A	Removal of the Additional Center Tank (ACT)
TASK 28-11-49-000-001-A	Removal of the ACT Integrated Impact Wall
Actuator of the ACT Vent Shut-off Valve ** ON A/C NOT FOR ALL
Actuator of the ACT Vent Shut-off Valve ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-28-55-860-050-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 on:

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

Subtask 28-28-55-865-050-A ** ON A/C NOT FOR ALL

B. 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

Subtask 28-28-55-010-051-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Remove the integrated impact wall from the aft cargo-compartment (Ref. AMM TASK 28-11-49-000-001).

Subtask 28-28-55-010-051-B ** ON A/C NOT FOR ALL

C. Get Access
(1) Get access to the actuator of the ACT2:
(a) Remove the integrated impact wall from the aft cargo-compartment (Ref. AMM TASK 28-11-49-000-001).
(2) Get access to the actuator of the ACT1:
(a) Remove the ACT2 from the aft cargo-compartment (Ref. AMM TASK 28-11-27-000-001).

4. Procedure
Subtask 28-28-55-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Actuator of the ACT Vent Shut-off Valve
(1) Disconnect the electrical connector (5) from the receptacle (6).
(2) Put blanking caps on the disconnected electrical connector (5) and the receptacle (6).
(3) Loosen the screw (3), then open and remove the V-clamp (2) from the actuator (1).
(4) Remove the actuator (1) from the ACT vent shut-off valve (4).

[Rev.10 from 2021] 2026.04.02 06:18:00 UTC