# SDR DXTA2026100810071

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2026
- Submitted: October 8, 2026
- Operation: Air carrier
- Aircraft: [N992QS](https://openairdocs.org/aircraft/N992QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0476
- Aircraft time: 359 hours, 241 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: CBS252
- Part serial: 000125
- Condition: Inoperative
- 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/DXTA2026100810071

## Discrepancy

EMERGENCY LIGHT ARMED, INOPERATIVE EMERGENCY LIGHT FUNCTIONS NORMALLY IN ON POSITION.  PERFORMED EMERGENCY LIGHTING OPS CHECKED & FOUND NR 1 EMERGENCY BATTERY TO BE INOPERATIVE. IAW MM 33-50-00. GAINED ACCESS TO AFT CENTER FLOORBOARD (131BTC) IN COCKPIT & REMOVED NR 1 EMERGENCY BATTERY PACK REPLACEMENT.  ALL MX IAW MM 33-50-06.  EMERGENCY LIGHT, BATTERY PACK FOUND PART NUMBER INSTALLED, CBS28-2, IS DIFFERENT TO THE PROVIDED BATTERY PACK,  6430028-1. IAW AIPC, THIS PART IS NOT APPLICABLE TO THIS ACFTS SN RANGE. ALL MX IAW MM 33-50-06.  INSTALLED NEW EMERGENCY BATTERY ( CBS28-2 SN: 001259) IAW AMM 33-50-06, PERFORMED OPS CHK IAW AMM 33-50-00. NO DEFECTS NOTED.

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