SDR 2006FA0000481

Service difficulty report · Piston · Mooney M20K

Difficulty date: April 25, 2006
Submitted: May 15, 2006
Operation: General aviation
Aircraft: N43PG
Make and model: Mooney M20K
Aircraft serial: 252019
Engine: Cont TSIO360SB
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Piston
Part number: 646743
Condition: Eroded
Location: Engine
Part time: 700 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

THE OIL CONTROL RING LANDS ON PISTON SEVERLY ERRODED AT PISTON PIN HOLE, BOTH SIDES OF PISTON. THIS IS THE 13 TH PISTON THAT WE HAVE SEEN THIS ON, IN OUR ENGINE SHOP. SC MODIFICATIONS, HAS 12 OF THEM, HAVE SAME PROBLEM. HAVE ONE TO SHOW. (K)

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