# SDR KCSA20251209073

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 9, 2025
- Submitted: December 9, 2025
- Operation: Air carrier
- Aircraft: [N780CK](https://openairdocs.org/aircraft/N780CK), registered now
- Make and model: Boeing 777-36NER
- Registry model: [Boeing 777-36NER](https://openairdocs.org/model/boeing-777-36ner) (OpenAirDocs)
- Aircraft serial: 32787
- Aircraft time: 70,434 hours, 13,322 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: D71701100
- Part serial: 451424
- 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/KCSA20251209073

## Discrepancy

EMERGENCY LIGHT STA 322 BL0 SUPERNUMERARY AREA DOES NOT STAY ON, COMES ON FOR ONLY .5 SECONDS.   R & R EMERGENCY LIGHT POWER SUPPLY BATTERY PACK M23424 IAW AMM 33-51-06, OPS CHECK GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.