Ballast Unit - Fluorescent Tube Fault

TASK 33-21-00-810-809-A
Ballast Unit - Fluorescent Tube Fault

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 23-73-00-740-012	Ground Scanning of the Cabin Intercommunication Data System (CIDS)
AMM 33-21-11-000-001	Removal of the Ballast Unit, Lampholder and Fluorescent Tube
AMM 33-21-11-400-001	Installation of the Ballast Unit, Lampholder and Fluorescent Tube

3. Fault Confirmation
Subtask 33-21-00-710-072-A ** ON A/C NOT FOR ALL

A. Do the CIDS Ground Scanning AMM 23-73-00-740-012.

4. Fault Isolation
Subtask 33-21-00-810-065-A ** ON A/C NOT FOR ALL

A. If the Ground Scanning gives the maintenance message:

FLUO TUBE<APPL.AREA>SRXX X/BU

replace the related FLUORESCENT TUBE AMM 33-21-11-000-001 and AMM 33-21-11-400-001.

Subtask 33-21-00-710-073-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:31:55 UTC