# SDR DXTA2026010806439

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2026
- Submitted: January 16, 2026
- Operation: Air carrier
- Aircraft: [N680QS](https://openairdocs.org/aircraft/N680QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0278
- Aircraft time: 5,346 hours, 3,475 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Uplock Switch
- Part number: 67681565
- Part serial: 327927944
- Condition: Faulty
- Location: Mlg
- 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/DXTA2026010806439

## Discrepancy

UPON GEAR RETRACTION WE RECEIVED A GEAR DISAGREE L CAUTION MSG FOLLOWED BY A ADC SSEC MISCOMPARE. LEFT GEAR INDICATION DISPLAYED AN AMBER DN. FOLLOWED QRH GUIDANCE AND EXTENDED THE GEAR NORMALLY FOR A RETURN LANDING. HISTORY SHOWED LT UPLOCK SWITCH REPLACED 12/20 & NO RIGGING MENTIONED ON 12/24 POST FERRY MX EVENT.  IAW ARES REVIEW ARES SHOWS THE LT MLG UPLOCK SWITCH IS UP & LOCKED FROM POWER ON, ON LT PCB. BUT SHOWS NOT UP & LOCKED ON RT PCB. ONCE GEAR HANDLE PUT IN UP POSITION, A DISAGREE BTWN BOTH PCB'S & STOPS GEAR FROM MOVING ON THAT SIDE. ONCE GEAR HANDLE PUT IN DOWN POSITION, UP & LOCKED SWITCH GOES TO CORRECT POSITION.  PERFORMED ANALYSIS OF LIVE VIEW PCB WHILE MANIPULATING HARNESS & SWITCH, NO DEFECTS.  PERFORMED SEVERAL GEAR SWINGS, NO FAULTS & NO ABILITY TO DUPLICATE FAULT. PERFORMED RIGGING CHKS OF SWITCH & FOUND LT UPLOCK SWITCH RIGGED INCORRECTLY.  PERFORMED WIRING CHK OF SWITCH, NO FAULTS. PERFORMED WIRING CHK BTWN LT UPLOCK SWITCH TO GROUNDS & TO PCB, NO FAULTS. R & R PCB NC106 IAW AMM 24-60-40. OPS CHKD GOOD IAW AMM 24-60-40. R & R  LT MLG UPLOCK SWITCH SG007 IAW MM. CONTINUITY CHECK OF NEW SWITCH, NO DEFECTS.  PERFORMED MLG UPLOCK ADJUST CHK IAW MM 32-32-00. ADJUSTED LT & RT MLG UPLOCK SWITCH PLUNGERS.  PERFORMED 15 MLG OPS CHKS IAW MM 32-00-00, NO DEFECTS. POWER CYCLED ACFT & 5 MLG OPS CHKS IAW MM 32-00-00, NO DEFECTS.

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