# SDR DXTA2026021306862

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 11, 2026
- Submitted: February 13, 2026
- Operation: Air carrier
- Aircraft: [N588QS](https://openairdocs.org/aircraft/N588QS), registered now
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605721
- Aircraft time: 16,098 hours, 12,171 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: PN99131
- Part serial: SN1407
- Condition: Defective
- Location: Zone 200
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026021306862

## Discrepancy

THE FRONT EMERGENCY BATTERY PACK IS DEAD. WITH BATTERY SWITCH ON AND EMER LIGHT SWITCH ON, ALL EMERGENCY LIGHTS CHECK NORMAL. TURNING THE BATTERY SWITCH TO OFF, THE FRONT EMERGENCY LIGHTS DO NOT ILLUMINATE.  T2PL6D00DP743- REMOVED FRONT EMERGENCY BATTERY PACK AND INSTALLED REPAIRED FRONT EMERGENCY BATTERY PACK IAW MM 33-50-01. EMERGENCY BATTERY PACK REPAIRED.  OPS CHECK FAILED. TROUBLESHOT WIRING, & SWITCH, FOUND DIODE D1051 FAILED.  REMOVED THE DIODE AND INSTALLED A NEW DIODE IAW SPM 20-30-25, AND  WDM 33-50-01. OPS CHECKED GOOD.

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