# SDR DXTA2026010506399

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 2026
- Submitted: January 5, 2026
- Operation: Air carrier
- Aircraft: [N563QS](https://openairdocs.org/aircraft/N563QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0113
- Aircraft time: 8,453 hours, 5,616 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Check Valve
- Part number: 1C5230
- Condition: Slow
- Location: Nlg
- Stage of operation: CL
- 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/DXTA2026010506399

## Discrepancy

UPON GEAR RETRACTION POST TAKEOFF, THE NLG FAILED TO RETRACT IN A TIMELY FASHION. THE NLG WAS PHYSICALLY DOWN, AND WE RECEIVED AN ADC SSEC MISCOMPARE EICAS MSG. AFTER APPROX 10-12 SECONDS THE NLG THEN RETRACTED AND BOTH THE EICAS MSG EXTINGUISHED WITH THE GEAR INDICATION GOING TO UP & NORMAL LOCKED/DOOR CLOSED. BOTH L/R MLG FUNCTIONED NORMALLY UNAFFECTED.  UPON EXTENSION AT THE DESTINATION THE GEAR EXTENDED WITH A LOUD THUNK BUT THE FUNCTION WAS NORMAL SHOWING DOWN AND LOCKED GREEN.   FUNCTION WAS NORMIAL DOWN & LOCKED. R & R HYD RETURN CHK VALVE & INSTALLED SUPPLIED, NEW HYD RETURN CHK VALVE.  WORK DONE IAW AMM 32-30-25. PERFORMED LANDING GEAR OPS CHK MULTIPLE TIMES. OPS CHKD GOOD. WORK DONE IAW AMM 32-00-00.

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