# SDR ASAA2026042065635

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 2026
- Submitted: April 22, 2026
- Operation: Air carrier
- Aircraft: [N251AK](https://openairdocs.org/aircraft/N251AK), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 62470
- Aircraft time: 35,323 hours, 11,466 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: D71702001
- 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/ASAA2026042065635

## Discrepancy

INTERIOR EMER LIGHTS BETWEEN ROW 1-11 ON LH SIDE INOP. GROUNDED - YES. REPLACED LH ROW 1-11 EMER LIGHT BATTERY PACK IAW AMM 33-51-06. OPS CHECK GOOD. 4APR676B.

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