# SDR ASAA2026052666346

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 26, 2026
- Submitted: May 28, 2026
- Operation: Air carrier
- Aircraft: [N531AS](https://openairdocs.org/aircraft/N531AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35199
- Aircraft time: 55,781 hours, 16,773 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: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2026052666346

## Discrepancy

WHILE PERFORMING T/C 782330088, FOUND EMRGENCY LIGHTS BATTERY PACK INOP (LH, 9 WINDOWS FWD OF FWD OVERWING EXIT, FOOT PANEL). GROUNDED - YES. REMOVED AND REPLACED POWER SUPPLY BATTERY PACK REF AMM 33-51-06, OPS CHECK GOOD 3 EA MIG-51A INSTALLED/REMOVED.

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