# SDR VNAA0212004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 3, 2002
- Submitted: December 9, 2002
- Operation: Air carrier
- Aircraft: [N462PS](https://openairdocs.org/aircraft/N462PS), registered now
- Make and model: Dorner DO328100
- Aircraft serial: 3084
- Aircraft time: 9,973 hours, 9,634 cycles
- Engine: Pwa PW119B
- Propeller: Hartzl HDE6C3B
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 501122803
- Part serial: 7357
- Condition: Failed
- Location: Cabin
- Part time: 18,438 hours, 16,051 cycles
- Stage of operation: TX
- How discovered: C
- Nature of condition: L
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/VNAA0212004

## Discrepancy

THE CREW REPORTED THAT THE BACK UP BATTERY DOES NOT ILLUMINATE DURING TEST.  MAINTENANCE INSPECTED AND REPLACED THE EMERGENCY POWER SUPPLY IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-00-00.  OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

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