Fuel Pumps - RELAY-BUS 1/ESS, L(R) TK PUMP 1 Failure Indication at Engines Start

TASK 28-21-00-810-815-A
Fuel Pumps - RELAY-BUS 1/ESS, L(R) TK PUMP 1 Failure Indication at Engines Start

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

WARNING: WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT: EN50020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.

1. Possible Causes

RELAY-BUS 1/ESS, L TK PUMP 1 (63QA), 103VU
RELAY-BUS 1/ESS, R TK PUMP 1 (64QA), 103VU

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-22-00-710-001	Operational Test of the Generator Line Contactor (GLC-1) Opening in the Smoke Procedure
ASM 282101

3. Fault Confirmation
Subtask 28-21-00-710-064-A

A. Do the Operational Test of the Generator Line Contactor GLC-1) Opening in the Smoke Procedure AMM 24-22-00-710-001.

4. Fault Isolation
Subtask 28-21-00-810-064-A

A. If after the first engine (ENG No. 2) start:

the FUEL - ECAM WARNING, L(R) TK PUMP 1 LO PR WARN is given before the second engine (ENG No. 1) start
and after the second engine (ENG No. 1) start, the same warning is not given.

(1) Check ASM 282101/replace the RELAY-BUS 1/ESS, L TK PUMP 1 (63QA), 103VU or RELAY-BUS 1/ESS, R TK PUMP 1 (64QA), 103VU.
(2) Do the test given in Para 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:28:35 UTC