Yellow Electrical Pump operates after Unlatching of Aft Cargo Door

TASK 52-36-00-810-808-A
Yellow Electrical Pump operates after Unlatching of Aft Cargo Door

1. Possible Causes

MAN SEL VALVE-AFT CARGO DOOR [2504MJ]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 523501
AWM 523501
AMM 52-36-15-000-001	Removal of the Manual Selector Valve
AMM 52-36-15-400-001	Installation of the Manual Selector Valve

3. Fault Confirmation
Subtask 52-36-00-860-058-A

A. Aircraft Maintenance Configuration
(1) Make sure that the FWD cargo door is in this condition:

a second person does not operate the FWD cargo door
the selector of the MAN SEL VALV -FWD CARGO DOOR (2501MJ) is in the NEUTRAL position.

(2) Unlatch the aft cargo-compartment door (referred to as the cargo door) as follows:
(a) Push the handle flap in to release the door handle from the catch of the door structure.

WARNING: MAKE SURE THAT THE TRAVEL RANGE OF THE CARGO DOOR IS CLEAR BEFORE YOU UNLOCK IT. STAY AFT OF (LEFT OF) THE DOOR WHEN YOU UNLOCK IT BECAUSE IT CAN OPEN SUDDENLY AND CAUSE INJURY.

(b) Move the door handle to the UNLOCKED position.

4. Fault Isolation
Subtask 52-36-00-810-065-A

A. The fault confirmation gives that the ELEC PUMP-Y (3075GX) starts to operate:

Make sure that the selector of the MAN SEL VALVE-AFT CARGO DOOR [2504MJ] is in the NEUTRAL position.

(1) If the selector is not in the NEUTRAL position:

Put the selector manually back in the NEUTRAL position to stop the operation of the ELEC PUMP-Y (3075GX).

(2) If the ELEC PUMP-Y (3075GX) stops operation:
(a) Replace the MAN SEL VALVE-AFT CARGO DOOR [2504MJ] , AMM 52-36-15-000-001 and AMM 52-36-15-400-001.
(3) If the selector is in the NEUTRAL position but the ELEC PUMP-Y (3075GX) does not stop the operation:

Do a check for continuity between connector A/A and connector A/B of MAN SEL VALVE-AFT CARGO DOOR [2504MJ] ASM 523501.

(4) If there is continuity:
(a) Replace the MAN SEL VALVE-AFT CARGO DOOR [2504MJ] AMM 52-36-15-000-001 AMM 52-36-15-400-001.
(b) If there is no continuity:

Do a check and repair the wiring between the MAN SEL VALVE-AFT CARGO DOOR [2504MJ] connector A/B and the LGCIU-2 (5GA2) connector AA/7B ASM 523501.

(5) If there is continuity:
(a) Replace the MAN SEL VALVE-AFT CARGO DOOR [2504MJ] AMM 52-36-15-000-001 AMM 52-36-15-400-001.
(b) If there is no continuity:

Do a check and repair the wiring between the MAN SEL VALVE-AFT CARGO DOOR [2504MJ] connector A/C and the ground terminal (6798VN) AWM 523501.

5. Close-up
Subtask 52-36-00-869-057-A

A. Unlatch the aft cargo door as given in Para. 3.A to make sure that the ELEC PUMP-Y (3075GX) does not start to operate.

[Rev.8 from Aug 2018] 2026.04.04 04:34:53 UTC