# SDR YAD2001F00005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 8, 2001
- Submitted: August 6, 2001
- Operation: Air carrier
- Aircraft: N75941
- Make and model: Cessna 207A
- Registry model: [Cessna 207A](https://openairdocs.org/model/cessna-207a) (OpenAirDocs)
- Aircraft serial: 20700656
- Engine: Cont IO520F
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: SA52000A20P
- Part serial: 52J9914661
- Condition: Damaged
- Location: Engine
- Part time: 1,353 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: E, R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YAD2001F00005

## Discrepancy

AIRCRAFT DEPARTED AIRPORT AND ENGINE BEGAN RUNNING VERY ROUGH.  AIRCRAFT RETURNED TO THE AIRPORT (UNABLE TO MAINTAIN POWER OR ALTITUDE).  MAINTENANCE FOUND NR 4 CYLINDER HAD BROKEN AND BENT PUSHRODS.  THE EXHAUST VALVE PUSHROD WAS FOUND BROKEN FOR ABOUT 8 INCHES IN LENGTH.  FURTHER INVESTIGATION REVEALED A BENT PUSHROD IN NR 2 CYLINDER.  SUSPECT STUCK/ STICKING VALVES CAUSED FAILURE.  ALL CYLINDERS WERE INSTALLED FACTORY NEW AT ENGINE OVERHAUL.

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