SDR AU990939

Service difficulty report · Valve Seat · Robsin R22BETA

Difficulty date
September 2, 1999
Submitted
March 26, 2000
Operation
General aviation
Make and model
Robsin R22BETA
Engine
Lyc O320B2C
Part
Valve Seat
Condition
Loose
Location
Engine
Stage of operation
CR
Nature of condition
E
Precautionary procedure
A

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

What was found

(AUS) NR 1 CYLINDER EXHAUST VALVE SEAT DISLODGED AND HELD THE EXHAUST VALVE OPEN ALLOWING IT TO BE CONTACTED BY THE PISTON WHICH THEN SNAPPED THE VALVE HEAD OFF. DAMAGE TO NR 1 CYLINDER AND CONNECTING ROD.