# SDR HYIA20180404001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 30, 2018
- Submitted: April 4, 2018
- Operation: Air carrier
- Aircraft: [N26156](https://openairdocs.org/aircraft/N26156), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0112
- Aircraft time: 23,859 hours
- Engine: Cont TSIO520VB
- Engine time: 7,384 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 658552A2
- Part serial: AC16DA753
- Condition: Damaged
- Location: Nr 3
- Part time: 1,755 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20180404001

## Discrepancy

PILOT REPORTED LEFT ENGINE VIBRATION DURING FLIGHT.  MAINTENANCE INSPECTED AND FOUND THE LEFT ENGINE NR 3 CYLINDER WITH A COLLAPSED EXHAUST LIFTER, BROKEN VALVE GUIDE AND THE PISTON PIN BUSHING DAMAGED AND CRACKED.  THE CYLINDER AND CONNECTING ROD HAS BEEN CHANGED AND OPERATIONALLY CHECKED WITH NO FURTHER DEFECTS NOTED.

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