# SDR 97UAL900315

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N172UA
- Make and model: Boeing 747422
- Aircraft serial: 24363
- Engine: Pwa PW4056
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Failed
- Location: Cabin
- Stage of operation: IN
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97UAL900315

## Discrepancy

UPPER DECK EMERGENCY EXIT LIGHTS NEAR STAIRS INTERMITTENT.  REPLACED EMERGENCY EXIT LIGHT POWER SUPPLY.  OPERATION CHECKS NORMAL.

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