SDR 2011FA0000768

Service difficulty report · Engine · Cessna TU206F

Difficulty date: November 16, 2011
Submitted: December 2, 2011
Operation: General aviation
Aircraft: N9125Y
Make and model: Cessna TU206F
Aircraft serial: U20603324
Engine: Cont TSIO520C
System (JASC): 8500 · Engine (Reciprocating)
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

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

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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