SDR CA101213004

Service difficulty report · Stud · Cessna 305A

Difficulty date: December 2, 2010
Submitted: March 15, 2011
Operation: Air carrier
Make and model: Cessna 305A
Aircraft time: 4,542 hours
Engine: Cont O47011B
System (JASC): 2140 · Heating System
Part: Stud
Condition: Separated
Location: Heat Shroud
Stage of operation: DE
How discovered: O
Nature of condition: E
Precautionary procedure: O

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

What was found

(CAN) ITEM IS EXHAUST CABIN HEATER INSPECTED AS PER CF 90-03. FLIGHT CREW FOUND DAMAGED SPARK PLUG IN CYLINDER NR 2. REMOVED DUE TO DAMAGE ON CYLINDER HEAD AND PISTON. SMALL STUD FOUND INSIDE CYLINDER NR 2 INTAKE MANIFOLD. STUD CAME FROM CABIN HEATER ONE WAS MISSING DURING INSPECTION. ONE OTHER WAS LOOSE AT BASE WELDMENT. IT WAS EASILY REMOVED. IN FLIGHT ENGINE FAILURE DID NOT HAPPEN, BUT COULD HAVE IF STUD DAMAGED VALVES OR MOVED TO ANOTHER CYLINDER.

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