# SDR UIEA2020040200529

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2020
- Submitted: April 2, 2020
- Operation: Air carrier
- Aircraft: [N464MC](https://openairdocs.org/aircraft/N464MC), registered now
- Make and model: Boeing 747446
- Aircraft serial: 26341
- Aircraft time: 100,863 hours, 18,901 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 20131A
- Part serial: 121137
- Condition: Discharged
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2020040200529

## Discrepancy

EMERGENCY LIGHT BATTERY PACK (M5056) CAPACITY TEST FAILED.(<P>EMERGENCY LIGHT BATTERY PACK (M5056) REPLACED. OPERATIONAL CHECK NORMAL AMM 33-51-00.</P>)

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