# SDR DXTA2021071645330

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 15, 2021
- Submitted: July 19, 2021
- Operation: Air carrier
- Aircraft: [N509QS](https://openairdocs.org/aircraft/N509QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0028
- Aircraft time: 3,101 hours, 1,962 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: CBS281
- Part serial: 560OM
- Condition: Defective
- Location: Emergency Lights
- 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/DXTA2021071645330

## Discrepancy

CABIN EMERG LIGHT: WITH MAIN BATTERIES OFF AND EMER LTS - ON, NO EMERGRNCY LIGHTS ILLUMINATE.  WHEN SWITCH ITS MOVED TO ARM, EXIT SIGN ON AFT LAV DIVIDER (LEFT SIDE) REMAINS OFF.  APPEARS TO BE FAILED BATTERY PACK(S). // SIGNOFF // REMOVED AND REPLACED #1, #2, #3 AND #4 EMERGENCY LIGHTING BATTERY PACKS IAW CE-68OA IAM LL-133-5O-O6. OPS CHECK GOOD.

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