# SDR 9JLA2016101711306

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2016
- Submitted: October 17, 2016
- Operation: Air carrier
- Aircraft: [N323SK](https://openairdocs.org/aircraft/N323SK), registered now
- Make and model: Cessna 525A
- Registry model: [Cessna 525A](https://openairdocs.org/model/cessna-525a) (OpenAirDocs)
- Aircraft serial: 525A0134
- Aircraft time: 2,272 hours, 1,872 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Uplock Switch
- Part number: 65430087
- Condition: Defective
- Location: Mlg
- 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/9JLA2016101711306

## Discrepancy

AFTER TAKEOFF THE CREW REPORTED THAT THERE WAS THREE LOUD POPS DURING THE LANDING GEAR RETRACTION FOLLOWED BY A NORMAL GEAR UP INDICATIONS. THE CREW ELECTED TO REPEAT A LANDING CYCLE WITH SAME RESULTS. THE CREW RETURNED BACK TO THE AIRPORT FOR INVESTIGATE. THE MAINTENANCE CREW TROUBLESHOT AND DETERMINED THAT THE LEFT MAIN LANDING GEAR UPLOCK SWITCH WAS DEFECTIVE. A NEW SWITCH WAS INSTALLED. OPS CHECKED SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.

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