# SDR GV8S2016FA0000102

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 26, 2016
- Submitted: February 26, 2016
- Operation: General aviation
- Aircraft: [N142UD](https://openairdocs.org/aircraft/N142UD), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S11490
- Aircraft time: 93 hours
- Engine: Lyc IO360L2A
- Engine time: 93 hours
- Propeller: Mcauly 1A170E
- System (JASC): [7322 · Fuel Control/Reciprocating Engines](https://openairdocs.org/jasc/7322)
- Part: Fuel Control
- Part number: AV25765362
- Condition: Contaminated
- Location: Engine
- Part time: 93 hours
- Stage of operation: TX
- How discovered: C
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/GV8S2016FA0000102

## Discrepancy

IDLE SETTING WILL NOT STAY CONSTANT. IDLE CUT OFF RPM RISE VARIES FROM 300 RICH TO 50 RICH.  DEPENDING ON THE MOOD EACH PREFLIGHT SHOWS A DIFFERENT SETTING. AFTER ADJUSTMENT WHILE ENGINE IS HOT.  CONTAMINATION FOUND IN VENTURI, SERVO BODY AND REGULATOR.

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