# SDR 99UAL900543

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N120UA](https://openairdocs.org/aircraft/N120UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29166
- Engine: Pwa PW4056
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Pack
- Part number: 582233
- Condition: Inop
- Location: Row 15-18
- Stage of operation: NR
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99UAL900543

## Discrepancy

EMERGENCY EXIT LIGHTS AT ROWS 15-18 LEFT SIDE ARE INTERMITTENT.  UPPER DECK EEL POWER PACK FAILED.  REPLACED POWER PACK.

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