# SDR DXTA2025122206164

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 17, 2025
- Submitted: December 22, 2025
- Operation: Air carrier
- Aircraft: [N639QS](https://openairdocs.org/aircraft/N639QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0193
- Aircraft time: 6,962 hours, 4,553 cycles
- System (JASC): [2435 · Starter-Generator](https://openairdocs.org/jasc/2435)
- Part: Starter Gen
- Part number: 99146851
- Part serial: P2947
- Condition: Damaged
- Location: Zone 100
- Stage of operation: TX
- How discovered: O
- Nature of condition: G, J, B
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2025122206164

## Discrepancy

DURING ENGS START,  APU DRAW REACHED 1100 AMPS MOMENTARILY & REMAINED ABOVE 700 FOR THE DURATION OF PROCESS WHILE BATTERIES BARELY CONTRIBUTED TO START. AFTER SEQUENCE FINISHED,  ELECTRICAL SYNOPTIC SHOWED BOTH MAIN GENS GEN OFF & APU GEN OFF. EICAS PRESENTED DC GEN OFF, DC GEN OFF APU, CHECK DOORS, NOSE DOOR OPEN L, FLAPS FAIL. PAX & CREW DETECTED A DISTINCTIVE ODOR LIKE ELECTRICAL NATURE. REMOVED INTERNALLY MELTED STARTER/GEN  AND INSTALLED OVERHAULED STARTER/GEN IAW AMM 80-10-25. OPS CHKD GOOD. REMOVED BURNED APU CONTROL PCB AND INSTALLED A REPAIRED PCB IAW AMM 24-60-35. OPS CHKD GOOD.

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