# SDR 2016FA0000147

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 26, 2016
- Submitted: March 29, 2016
- Operation: General aviation
- Aircraft: [N620MM](https://openairdocs.org/aircraft/N620MM), registered now
- Make and model: Cessna 180A
- Registry model: [Cessna 180A](https://openairdocs.org/model/cessna-180a) (OpenAirDocs)
- Aircraft serial: 32780
- Aircraft time: 10,792 hours
- Engine: Cont O470K
- Engine time: 148 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Rocker
- Part number: 652130
- Condition: Broken
- Location: Engine
- Part time: 10,792 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2016FA0000147

## Discrepancy

WHILE ON A FLIGHT, ACFT AT CRUISE, 4500 VMC, PILOT FELT A SUDDEN POWER LOSS AND A VIBRATION.  PILOT LANDED AND PERFORMED AN INSPECTION WITH A MECHANIC. ONCE IN THE ENGINE, THEY FOUND A BROKEN ROCKER ARM.  REPLACED SAME AND RETURNED THE ACFT TO SERVICE.

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