# SDR 2011FA0000768

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2011
- Submitted: December 2, 2011
- Operation: General aviation
- Aircraft: [N9125Y](https://openairdocs.org/aircraft/N9125Y), registered now
- Make and model: Cessna TU206F
- Registry model: [Cessna TU206F](https://openairdocs.org/model/cessna-tu206f) (OpenAirDocs)
- Aircraft serial: U20603324
- Engine: Cont TSIO520C
- System (JASC): [8500 · Engine (Reciprocating)](https://openairdocs.org/jasc/8500)
- Part: Engine
- Part number: TSIO520C
- Part serial: 14087471C
- Condition: Failed
- Part time: 35 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2011FA0000768

## Discrepancy

ACFT ENGINE HAD 35 HRS SINCE O/H.  O/H FACILITY "BROKE IN" ENGINE.  POST CATASTROPHIC FAILURE INSPECTION REVEALED EXTREMELY HIGH TEMPERATURES, IE: CRANKSHAFT JOURNALS MELTED, STRETCHED VALVES, DISCOLORATION IN RODS AND CYLINDERS.  EXACT CAUSE UNDETERMINED.  PROBABLE CAUSE IS IMPROPER LEAN-TO PEAK PROCEDURE.

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