# SDR ASAA2026061766878

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 17, 2026
- Submitted: June 23, 2026
- Operation: Air carrier
- Aircraft: [N277AK](https://openairdocs.org/aircraft/N277AK), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 62472
- Aircraft time: 24,565 hours, 7,940 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/ASAA2026061766878

## Discrepancy

FWD CLOSEOUT PANEL EXIT SIGN IS INOP. GROUNDED - YES. REMOVED AND REPLACED BATTERY PACKS M1676 AND M1671 IAW B737 AMM 33-51-06-960-806. OPS CHECK GOOD.

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