Failure of the GCU 1

TASK 24-22-00-810-801-A
Failure of the GCU 1

1. Possible Causes

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	DYNAMOMETER 15 DAN (33 LBF) - PULL

B. Referenced Information

REFERENCE	DESIGNATION
ESPM 2048230
AWM 242201
AMM 24-22-34-000-001	Removal of the GCU-1(2)
AMM 24-22-34-400-001	Installation of the GCU-1(2)
AMM 24-41-00-740-004	Operational Check of the GPCU via the CFDS

3. Fault Confirmation
Subtask 24-22-00-740-050-A ** ON A/C NOT FOR ALL

A. Test
Do the operational check of the GPCU with the CFDS AMM 24-41-00-740-004.

4. Fault Isolation
Subtask 24-22-00-810-050-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message GCU1:

(1) If the voltage on each phase is correct:

(2) If the voltage on one phase is not correct:

do a pin retention check ESPM 2048230 of the sockets of the 400VC1 AWM 242201. Use a DYNAMOMETER 15 DAN (33 LBF) - PULL, the CANNON value is 1.2 daN (2.7 lbf) minimum and the SOURIAU value is 2.8 daN (6.3 lbf) minimum, in relation to pin/socket type used.

[Rev.8 from Aug 2018] 2026.04.04 04:26:34 UTC