# SDR UIEA2021011500065

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 16, 2021
- Submitted: January 20, 2021
- Operation: Air carrier
- Aircraft: [N429MC](https://openairdocs.org/aircraft/N429MC), registered now
- Make and model: Boeing 747481
- Aircraft serial: 24833
- Aircraft time: 106,484 hours, 16,008 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 90083
- Part serial: 8822
- Condition: Inoperative
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2021011500065

## Discrepancy

UPPER DECK EMERGENCY LIGHT IS INOPERABLE.  REMOVED AND REPLACED U/D POWER SUPPLY UNIT.  OPERATINS CHECK U/D EMERGENCY LIGHT OK, PER AMM 33-51-04.

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