Removal of the Check Valve

TASK 26-23-21-000-002-A
Removal of the Check Valve

ZONE: 150
ZONE: 160
ZONE: 170
FIN: 5046WM ** ON A/C NOT FOR ALL
FIN: 5047WM ** 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	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
160	BULK CARGO COMPARTMENT AFT BULKHEAD OF AFT CARGO COMPARTMENT TO AFT BULKHEAD OF BULK CARGO COMPARTMENT
170	AFT CAB U/FLOOR COMPT AFT BHD OF BULK
161DW, 811, 826

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
Check Valve (5046WM, 5047WM)

3. Job Set-up
Subtask 26-23-21-861-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 26-23-21-010-052-A ** ON A/C NOT FOR ALL

B. Get access to the avionics compartment.
(1) Open the access door 811 (Ref. AMM TASK 52-41-00-010-002).

Subtask 26-23-21-865-053-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
49VU	AIR COND/CARGO FIRE/EXTIG/BTL2	8WX	C04
49VU	AIR COND/CARGO FIRE/EXTIG/BTL1	1WX	C03

Subtask 26-23-21-010-053-C ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
(2) Set the CARGO COMPT LIGHT switch 8LU to the ON position.
(3) Remove the partition panel 161DW (Ref. AMM TASK 25-55-12-000-001).

4. Procedure
Subtask 26-23-21-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Check Valve

NOTE: The removal procedure is the same for the check valves 5046WM and 5047WM.

(1) Loosen the nut (2) and disconnect the pipe (1) from the check valve (3).
(2) Loosen the nut (4) and disconnect the pipe (5) from the check valve (3).
(3) Remove the check valve (3).
(4) Put the PLUG-BLANKING in each disconnected line end.
(5) Put PLUG - BLANKING on the open ports of the check valve (3).

[Rev.10 from 2021] 2026.04.01 06:44:51 UTC