Emer. Lighting - Battery charge failure

TASK 33-51-00-810-817-A
Emer. Lighting - Battery charge failure

1. Possible Causes

BATTERIES

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 33-51-00-710-001	Operational Test of the Emergency Lights
AMM 33-51-00-710-003	Check of the Battery Capacity
AMM 33-51-38-000-002	Removal of the Battery of the Emergency Power-Supply Unit
AMM 33-51-38-400-002	Installation of the Battery of the Emergency Power-Supply Unit

3. Fault Confirmation

CAUTION: DO NOT USE THE TEACH-IN PROCEDURE AS AN ALTERNATIVE FOR TROUBLESHOOTING. A TEACH-IN PROCEDURE IS NOT A RESET PROCEDURE. BEFORE YOU DO A TEACH-IN PROCEDURE, MAKE SURE THAT YOU CORRECTED ALL FAILURES. IF YOU DO NOT OBEY THIS, FAILURES CAN CAUSE A MALFUNCTION OF THE CABIN EMERGENCY LIGHTING SYSTEM.

Subtask 33-51-00-710-081-A

A. Test
(1) Do the Operational test of Emergency Lights by 'TEST EMER LIGHT SYS' pushbutton AMM 33-51-00-710-001.
(2) Do the Battery Capacity Check by 'TEST EMER LIGHT BAT' pushbutton AMM 33-51-00-710-003.

NOTE: If you do the battery test, you must know that approximately 3 hours are necessary to do the test. In some conditions the battery test time can expand.

or

Replace the BATTERIES of all EPSUs by fully charged ones AMM 33-51-38-000-002 and AMM 33-51-38-400-002.

4. Fault Isolation
Subtask 33-51-00-810-081-A ** ON A/C NOT FOR ALL

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Subtask 33-51-00-810-082-A ** ON A/C NOT FOR ALL

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Subtask 33-51-00-710-082-A

C. Do the Operational test of Emergency Lights by 'TEST EMER LIGHT SYS' pushbutton AMM 33-51-00-710-001.

[Rev.8 from Aug 2018] 2026.04.04 04:32:09 UTC