# SDR DXTA2026041307577

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 8, 2026
- Submitted: April 13, 2026
- Operation: Air carrier
- Aircraft: [N515QS](https://openairdocs.org/aircraft/N515QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0053
- Aircraft time: 8,779 hours, 5,859 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Uplock Switch
- Part number: S31771
- Condition: Defective
- Location: Zone 700
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026041307577

## Discrepancy

DURING CLIMB THRU ABOUT FL320 WE RECEIVED BOTH LEFT AND RIGHT MAIN GEAR YELLOW DN AND NOSE GEAR  WAS YELLOW HASH MARKS  VIBRATIONS FROM GEAR.  AFTER WE SLOWED AND DESCENDED BELOW 15000  WE RAN THE QRH LANDING GEAR DID NOT RETRACT CHECKLIST   WE RECEIVED 3 GREEN INDICATIONS AND  WENT TO PHILADELPHIA   MCC REQUESTED WE VERIFY IF THE GEAR WAS BLOWN DOWN. WE FOUND NO INDICATION THAT THE GEAR WAS BLOWN DOWN, GEAR EMER BOTTLE FOUND AT 1900PSI AND BREAK AWAY IS IN NORMAL CONDITION. C/W GEAR BUMP TROUBLESHOOTING, STRUT CHROME FOUND AT 9.75, UPPER BARREL FOUND AT 285 PSI AND LOWER BARREL FOUND AT 20PSI. WORK PERFORMED PER AMM32-00-00. C/W GVI OF NLG UPLOCK SWITCH HARNESS, NO DEFECTS NOTED. C/W WIRE CHECKS OF THE NLG UPLOCK SWITCH, NO DEFECTS NOTED. C/W NLG UPLOCK ACTUATOR CABLE ADJUSTMENT CHECK NO DEFECTS NOTED AT THIS TIME, WORK PERFORMED PER AMM 32-34-00. WE ALSO DW 2 SUCCESSFUL GEAR CYCLES, WITH NO ISSUES AND GOOD INDICATIONS. JL 4/9/2026 MCC HAS REQUESTED WE SERVICE THE NLG STRUT PRESSURE TO CORRECT LEVELS AND REPLACE NLG UP LOCK SWITCH. SWITCH ON ORDER. SERVICED NLG STRUT PRESSURE, UPPER BARREL IS AT 280 PSI AND LOWER BARREL IS 40 PSI. REMOVED NLG UPLOCK SWITCH   AND INSTALLED NEW SWITCH, OPS CHECK GOOD. WORK PERFORMED PER AMM 32-32-10.

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