# SDR AALA202506051163

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2025
- Submitted: June 5, 2025
- Operation: Air carrier
- Aircraft: [N729AN](https://openairdocs.org/aircraft/N729AN), registered now
- Make and model: Boeing 777323ER
- Aircraft serial: 33127
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: D71702001
- Part serial: 58698
- Condition: Inoperative
- Location: Zone 200
- 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/AALA202506051163

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: FOUND OFAR (M33143) BATTERY PACK (LEFT SIDE) INOP. NEGATIVE LIGHTING CAME ON DURING TEST OF EMERGENCY BACK-UP LIGHTING. MAINTENANCE REPLACED LH DOOR #5 EMERGENCY BATTERY M33143 PER AMM 33-51-06.

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