Back-Up Start-Contactor Fault (APS 3200)

TASK 49-40-00-810-806-A
Back-Up Start-Contactor Fault (APS 3200)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 49-00-00-710-008	Operational Test of the APU
AMM 49-42-55-000-001	Removal of the Start Contactors
AMM 49-42-55-400-001	Installation of the Start Contactors

3. Fault Confirmation
Subtask 49-40-00-710-060-A ** ON A/C NOT FOR ALL

A. Do the operational test of the APU AMM 49-00-00-710-008.

4. Fault Isolation
Subtask 49-40-00-810-055-B ** ON A/C NOT FOR ALL

A. If the APU Class 3 Faults Page gives the maintenance message:

CONTACTOR (10KA):
Fault Code Number: 127

replace the CONTACTOR-BACK-UP START [10KA] AMM 49-42-55-000-001 and AMM 49-42-55-400-001.

Subtask 49-40-00-710-061-B ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:39 UTC