# SDR UIEA2022042800410

- 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: 87002
- Condition: None
- Stage of operation: IN
- How discovered: V
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2022042800410

## Discrepancy

FOUND THE EMERGENCY LIGHT BATTERY PACK (M5169) FUNCTIONAL FAIL(<P>1) IAW AMM 33-51-04-902-001-001 REV 103 REPLACED THE EMERGENCY LIGHT BATTERY PACK (M5169). 2) IAW AMM 33-51-04-903-001-001 REV 103 PERFORMED POWER SUPPLY TEST OF M5169, THE RESULT WAS SATISFACTORY</P>)

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