# SDR K11A2026031700374

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 2026
- Submitted: March 17, 2026
- Operation: Air carrier
- Aircraft: [N405CK](https://openairdocs.org/aircraft/N405CK), registered now
- Make and model: Boeing 737436
- Aircraft serial: 25407
- Aircraft time: 59,720 hours, 41,981 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: BPS73
- Part serial: 10827
- 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/K11A2026031700374

## Discrepancy

DURING T/S FOUND L1 DOOR  AND FLIGHT DECK ENTRY DOOR EMERGENCY LIGHTS INOP.  REMOVED AND REPLACED LEFT HAND EMERGENCY LIGHT BATTERY PACK IAW B737 AMM 33-51-51 OPS CHECK GOOD

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