# SDR 2022F00233

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 19, 2022
- Submitted: May 16, 2022
- Operation: General aviation
- Aircraft: [N766CF](https://openairdocs.org/aircraft/N766CF), registered now
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Aircraft serial: 317305102
- Aircraft time: 14,127 hours, 14,127 cycles
- Engine: Lyc LTIO540J2B
- Engine time: 377 hours, 377 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: None
- Part number: 4878621CH214
- Part serial: NA
- Condition: Dirty
- Location: Zone 700
- Part time: 14,127 hours, 14,127 cycles
- Component: N/A
- Stage of operation: LD
- How discovered: C
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2022F00233

## Discrepancy

PILOT REPORTED DURING LANDING THAT THE LEFT LANDING GEAR DOWN & LOCK LIGHT DID NOT ILLUMINATE AT DEPLOYMENT. AN "EMERGENCY LANDING GEAR EXTENSION" WAS PERFORMED BY THE PILOT WITH UP TO 60 HAND STROKES AS PER THE POH, BUT THE DOWN & LOCK LIGHT DID NOT ILLUMINATE. THE LANDING WAS NORMAL WITH NO INCIDENTS.  MAINTENANCE REVIEWED THE DOWN & LOCK LIGHT INDICATION SYSTEM AND FOUND THE LEFT MICRO-SWITCH WAS DIRTY WITH DEBRIS.  THE MICRO-SWITCH WAS CLEANED, LUBRICATED AND FREE PER PA31-350 MM PARAGRAPH 7-23.  PERFORMED LANDING GEAR RETRACTION PER PIPER MM AND FOUND SATISFACTORY.  PERIODIC MAINTENANCE TO INCLUDE CLEANING AND LUBRICATION OF THE LANDING GEAR DOWN & LOCK MICRO-SWITCH SHOULD REDUCE OR ELIMINATE THE RECURRENCE OF A FALSE INDICATION.

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