# SDR UIEA2022022500169

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 23, 2022
- Submitted: February 25, 2022
- Operation: Air carrier
- Aircraft: [N850GT](https://openairdocs.org/aircraft/N850GT), registered now
- Make and model: Boeing 747-87UF
- Registry model: [Boeing 747-87UF](https://openairdocs.org/model/boeing-747-87uf) (OpenAirDocs)
- Aircraft serial: 37570
- Aircraft time: 39,118 hours, 7,610 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 20131A
- Part serial: 115047
- Condition: Failed
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2022022500169

## Discrepancy

U/D EMER LT POWER SUPPLY (M516B) CAPACITY TEST FAIL(<P>U/D EMER LT POWER SUPPLY BATTERY REPLACED AND OPERATIONAL TEST NORMAL IAW AMM 33-51-00, REV 37 15 NOV 2021.</P>)

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