# SDR 2025FA0000602

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 20, 2025
- Submitted: September 1, 2025
- Operation: General aviation
- Aircraft: [N92228](https://openairdocs.org/aircraft/N92228), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S11498
- Aircraft time: 6,288 hours
- Engine: Lyc IO360L2A
- Engine time: 1,431 hours
- System (JASC): [2820 · Aircraft Fuel Distribution System](https://openairdocs.org/jasc/2820)
- Part: Servo
- Part number: 61J26428
- Part serial: AV50714195
- Condition: Contaminated
- Location: Fuel Sys
- Part time: 1,431 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: R, Y, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2025FA0000602

## Discrepancy

MOMENTARY ENGINE ROUGHNESS/VIBRATION. CLIMBING OUT ON THE MISSED APPROACH AT CRQ, ENGINE LOST BETWEEN 200-400RPM AND BEGAN CHUGGING, I CHECKED MIXTURE WHICH WAS FULL RICH, LEANED SLIGHTLY, THE CHUGGING STOPPED. I THEN MOVED THE MIXTURE FULL RICH AND DID NOT ENCOUNTER THE PROBLEM AGAIN. FUEL SERVO REPLACED.

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