# SDR DXTA2024011210594

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 12, 2024
- Submitted: January 12, 2024
- Operation: Air carrier
- Aircraft: [N591QS](https://openairdocs.org/aircraft/N591QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0144
- Aircraft time: 5,906 hours, 3,871 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: CBS281
- Part serial: 007816
- Condition: Faulted
- Location: Unknown
- Stage of operation: TX
- How discovered: C
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2024011210594

## Discrepancy

ON PREFLIGHT WITH AIRCRAFT BATTERIES OFF AND EMERGENCY EXIT LIGHTS SELECTED TO ARM, THE EMERGENCY LIGHTS FOR OVERHEADSEAT 7 AND EVACUATION PATH LIGHTS FOR SEATS 5 AND 8 DO NOT ILLUMINATE.  IF YOU SELECT AIRCRAFT BATTERIES ON AND EMER LIGHTS ON, THOSE LIGHTS NOW WORK.  SAME PROBLEM WE HAD YEATERDAY WE WROTE AIRPLANE UP FOR. REMOVED #3 EMERGENCY BATTERY PACK P,N:CBS28-1, 1 SN 007816 AND REPLACED WITH A REPAIRED UNIT IAW CE-680A MM 33-50..06. PUE TO EMERGENCY LIGHTS FOR OVERHEADSEAT 7 AND EVACUATION PATH LIGHTS FOR SEATS5 AND 8 DO NOT ILLUMINILTE. OPS CHECK GOODL

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