# SDR CA070503008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2007
- Submitted: June 7, 2007
- Operation: General aviation
- Make and model: Robsin R44RAVENII
- Aircraft time: 275 hours
- Engine: Lyc IO540AE1A5
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve Stem
- Part number: LW13622
- Condition: Bent
- Location: Engine
- Part time: 466 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: R, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA070503008

## Discrepancy

(CAN) AIRCRAFT WAS FLYING DURING A SEISMIC JOB.  ENGINE LOST POWER AND ENGINE WAS RUNNING ROUGH.  EMERGENCY LANDING TOOK PLACE.  MAINTENANCE INVESTIGATED AND FOUND NR 1 CYLINDER DEFECTIVE.  UPON FURTHER INVESTIGATION INTAKE VALVE STUCK OPEN AND CONTACTED PISTON.  CYLINDER AND PISTON WERE REPLACED AND AIRCRAFT WAS PUT BACK IN SERVICE. (TC NR 20070503008)

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