# SDR ASAA2025060958671

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2025
- Submitted: June 13, 2025
- Operation: Air carrier
- Aircraft: [N272AK](https://openairdocs.org/aircraft/N272AK), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44112
- Aircraft time: 29,142 hours, 9,368 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: ADD71701100
- 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/ASAA2025060958671

## Discrepancy

MULTIPLE CABIN EMERGENCY LIGHTS OUT. GROUNDED - YES. REMOVED AND INSTALLED SERVICEABLE EMERGENCY LIGHTS BATTERY PACKS, OPS CHECKS GOOD IAW B737-900 AMM 33-51-06-960-805. (S/N 432911, 432159, 433259, 434064, 432882, 433260, 434159)

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