# SDR DXTA2026090809572

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 5, 2026
- Submitted: September 8, 2026
- Operation: Air carrier
- Aircraft: [N640QS](https://openairdocs.org/aircraft/N640QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0242
- Aircraft time: 7,062 hours, 4,750 cycles
- System (JASC): [2430 · DC Generating System](https://openairdocs.org/jasc/2430)
- Part: Generator
- Part number: 51525001F
- Part serial: P8974
- Condition: Failed
- Location: Apu
- Stage of operation: TX
- 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/DXTA2026090809572

## Discrepancy

SHORT FINAL, STARTED APU FOR GROUND COOLING PAX COMFORT. AS SOON AS WE STARTED THE APU WE GOT WINDSHIELD HEAT INOP L AND DC GEN OFF L CAS MESSAGES DISPLAYED. CORRECTIVE ACTION: REPLACED L/H GCU WITH REPAIRED GCU IAW CE-680AS AMM 24-30-45. OPERATIONAL CHECK SATISFACTORY.

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