# SDR 2004UALA00235

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 13, 2004
- Submitted: March 23, 2004
- Operation: Air carrier
- Aircraft: N173UA
- Make and model: Boeing 747422
- Aircraft serial: 24380
- Aircraft time: 53,779 hours, 6,075 cycles
- Engine: Pwa PW4056
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Inoperative
- Location: Emergency Light
- 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/2004UALA00235

## Discrepancy

EMERGENCY LIGHTS AT SEATS 32, 33, 34 A, B & C COME ON AND OFF INTERMITTENTLY WHILE AT THE GATE.  REPLACED POWER SUPPLY UNIT ABOVE 3L.

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