# SDR ASAA2026030764807

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 7, 2026
- Submitted: March 12, 2026
- Operation: Air carrier
- Aircraft: [N253AK](https://openairdocs.org/aircraft/N253AK), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36348
- Aircraft time: 34,627 hours, 11,247 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71701100
- Condition: No Test
- 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/ASAA2026030764807

## Discrepancy

EMERGENCY LIGHT AT AFT LH OVERWING DOOR FAIL THE TEST. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACK (M1670 AT L/H SEAT ROW 22 AND PERFORMED OPS CHECK TEST GOOD IAW B737 NG AMM 33-51-06-960-805 SRXR430X.

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