# SDR SIMA0631

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 4, 2001
- Submitted: May 3, 2001
- Operation: Air carrier
- Aircraft: [N904AE](https://openairdocs.org/aircraft/N904AE), registered now
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B314
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 6013211
- Part serial: 19885
- Condition: Inoperative
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA0631

## Discrepancy

TYR - FLT 3738 - DURING PRE-FLIGHT, THE FLIGHT ATTENDANT INFORMED THE CREW THAT TWO EMERGENCY LIGHTS WERE INOPERATIVE.  AIRCRAFT WAS FERRIED TO DFW FOR MAINTENANCE.  MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK IN POWER SUPPLY UNIT 21LN.  OPS CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE.  (M)

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