Fuel, Main Transfer System - The Two Control Valves Do Not Close

TASK 28-26-00-810-802-A
Fuel, Main Transfer System - The Two Control Valves Do Not Close

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 28-26-00-810-804-A	Fuel, Main Transfer System - Control Valve 1 (Left) Does Not Close
TSM TASK 28-26-00-810-805-A	Fuel, Main Transfer System - Control Valve 2 (Right) Does Not Close
AMM 28-26-00-710-001	Operational Test of the Main Transfer System

3. Fault Confirmation
Subtask 28-26-00-710-051-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the Operational Test of the Main Transfer System AMM 28-26-00-710-001.
(a) If the main transfer system:

operates as specified, no troubleshooting work steps are necessary
does not operate as specified (and the left and right main transfer control valves do not close), do Para. 4.A.

4. Fault Isolation
Subtask 28-26-00-810-051-A ** ON A/C NOT FOR ALL

A. Procedure
(1) If the two transfer valves do not close, do the TSM procedures that follow:

the Main Transfer System - Control Valve 1 (Left) Does Not Close (Ref. TSM TASK 28-26-00-810-804)
the Main Transfer System - Control Valve 2 (Right) Does Not Close (Ref. TSM TASK 28-26-00-810-805).

[Rev.8 from Aug 2018] 2026.04.04 04:28:47 UTC