# SDR UIEA2022042800409

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2022
- Submitted: May 4, 2022
- Operation: Air carrier
- Aircraft: [N477MC](https://openairdocs.org/aircraft/N477MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29255
- Aircraft time: 94,642 hours, 16,669 cycles
- System (JASC): [3300 · Lighting System](https://openairdocs.org/jasc/3300)
- Part: None
- Part number: 20131A
- Part serial: 89429
- Condition: None
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2022042800409

## Discrepancy

FOUND M/D EMERGENCY LIGHT INOP(<P>IAW AMM 33-51-04-902-001-001 REV 104 REPLACED THE BATTERY PACK AND PERFORMED THE FUNCTIONAL TEST, THE RESULT WAS SATISFACTORY</P>)

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