# SDR CALA2026072417978

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2026
- Submitted: July 24, 2026
- Operation: Air carrier
- Aircraft: [N660UA](https://openairdocs.org/aircraft/N660UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 27115
- Aircraft time: 128,497 hours, 19,635 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: AD20131A
- Condition: No Test
- 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/CALA2026072417978

## Discrepancy

DURING EMERGENCY ESCAPE PATH LIGHT SYSTEM CHECK ON LOG PAGE 9707422 FOUND EMERGENCY CEILING LIGHTS FROM SEATS ROW 47LK TO 50LK DO NOT TURN ON. PERFORMED TROBLESHOOTING AND FOUND BATTERY PACK ON POWER SUPPLY M734 DISCHARGED. REMOVED AND REPLACED BATTERY PACK REF AMM 33-51-07/201. EMERGENCY LIGHTS SYSTEM IS GOOD FOR SERVICE.

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