Removal of the Shuttle Valve

TASK 38-41-44-000-001-A
Removal of the Shuttle Valve

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

ZONE: 130
ZONE: 170
FIN: 4215MM

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) - ADJUSTABLE
No specific	1	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
130	FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
170	AFT CAB U/FLOOR COMPT AFT BHD OF BULK
131PW
161DW

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 25-54-12-000-001-A	Removal of the Forward Cargo-Compartment Partition
TASK 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 38-10-00-614-002-A	Depressurization of the Potable Water System
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-003-A	Open the FWD or Aft Cargo-Compartment Door with the Hand Pump
Shuttle Valve ** ON A/C NOT FOR ALL
Shuttle Valve ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 38-41-44-861-050-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 38-41-44-614-050-A

B. Depressurize the potable water system (Ref. AMM TASK 38-10-00-614-002).

Subtask 38-41-44-941-050-A

C. Safety Precautions
(1) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the potable water system.

Subtask 38-41-44-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2001VU	WATER SYS-AIR-COMPRESSOR	19MD	F01

Subtask 38-41-44-010-050-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Open the aft cargo-compartment door (Ref. AMM TASK 52-30-00-860-001) (Ref. AMM TASK 52-30-00-860-003).
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(3) Remove partition 161DW (Ref. AMM TASK 25-55-12-000-001).

Subtask 38-41-44-010-050-B ** ON A/C NOT FOR ALL

E. Get Access
(1) Open the forward cargo-compartment door (Ref. AMM TASK 52-30-00-860-001) (Ref. AMM TASK 52-30-00-860-003).
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
(3) Remove partition 131PW (Ref. AMM TASK 25-54-12-000-001).

4. Procedure
Subtask 38-41-44-020-050-A

A. Removal of Shuttle Valve 4215MM

WARNING: DO NOT TOUCH THE UNIT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

(1) Disconnect the hose connections (1).
(2) If necessary, remove the nut (6), the screw (3), the washer (4) and the clamp (5).
(3) Remove shuttle valve 4215MM (2).
(4) Put the PLUG - BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.02 06:26:00 UTC