# SDR ASAA2026040665349

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 6, 2026
- Submitted: April 9, 2026
- Operation: Air carrier
- Aircraft: [N953AK](https://openairdocs.org/aircraft/N953AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44103
- Aircraft time: 12,939 hours, 3,712 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- 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/ASAA2026040665349

## Discrepancy

WHILE PERFORMING T/C #33-010-00, FOUND SEAT ROWS 16 ABC AND 16 DEF VERTICAL LIGHTED ARROW EMERGENCY LIGHT INOP. GROUNDED - YES. REMOVED AND REPLACED BOTH VERTICAL LIGHTED ARROW EMERGENCY LIGHTS ON SEAT ROWS 16 ABC AND 16 DEF REF AMM 33-51-01. OPS CHK FAILED. LIGHTS STILL INOP. SUSPECT WIRING DEFECT. WB 1080701 04/06/2026. REPLACED BATTERY PACK POWER SUPPLY (M1694) REF AMM 33-51-06-960-802. EMERGENCY BATTERY TEST PASS.

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