An aircraft maintenance technician (amt) reports finding a third A320 aircraft in a six week period ...

Narrative:

A320 aircraft service check; emergency light check failed. Emergency power supply unit (epsu) unit aft left. Emergency lights at [seat] rows 22C-24C; 28-30; 35-37 not working. Found wires and lights 'J' light and 'B' swapped at connector 13WL espu (emergency supply power unit). Returned wires to their correct location per wiring diagram manual (wdm) 33-51-08. Also found pinched wire at splice; at seat row 29-abc causing emergency exit lighting (eel) light to go dim; removed seat and rerouted wire. Operational check of eel seat lighting ok. This is the third emergency light wiring defect on an airbus that I have come across in the last six weeks. Aircraft out of service. The checks are not being followed.

Original NASA ASRS Text

Title: An Aircraft Maintenance Technician (AMT) reports finding a third A320 aircraft in a six week period that failed their Emergency Light Checks during a Service Check. Wires were found swapped at the Emergency Supply Power Unit (ESPU).

Narrative: A320 aircraft Service Check; Emergency Light Check failed. Emergency Power Supply Unit (EPSU) unit aft left. Emergency lights at [seat] rows 22C-24C; 28-30; 35-37 not working. Found wires and lights 'J' light and 'B' swapped at connector 13WL ESPU (Emergency Supply Power Unit). Returned wires to their correct location per Wiring Diagram Manual (WDM) 33-51-08. Also found pinched wire at splice; at seat Row 29-ABC causing Emergency Exit Lighting (EEL) light to go dim; removed seat and rerouted wire. Operational Check of EEL seat lighting OK. This is the third Emergency Light Wiring defect on an Airbus that I have come across in the last six weeks. Aircraft Out of Service. The checks are not being followed.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1122145
Time
Date	201310
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Emergency Floor Lighting
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

An aircraft maintenance technician (amt) reports finding a third A320 aircraft in a six week period that failed their emergency light checks during a service check. Wires were found swapped at the emergency supply power unit (espu).