# SDR 2015FA0000556

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 9, 2015
- Submitted: November 9, 2015
- Operation: General aviation
- Aircraft: [N43BM](https://openairdocs.org/aircraft/N43BM), registered now
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Aircraft serial: 421C1224
- Aircraft time: 11,133 hours
- Engine: Cont GTSIO520*
- Propeller: Mcauly 3FF32C501
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Intake Valve
- Condition: Failed
- Location: Engine
- Stage of operation: NR
- 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/2015FA0000556

## Discrepancy

PILOT REPORTED A VIBRATION IN THE LT ENGINE AND MADE A PRECAUTIONARY LANDING.  UPON INVESTIGATION IT WAS FOUND THAT THE LT ENGINE HAD DROPPED AN INTAKE VALVE AND A HOLE HAD BEEN KNOCKED IN THE CASE BELOW THE MAGS.

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