Incident Details
The CFI reported that shortly after takeoff, while climbing through approximately 300 feet above ground level, the airplane began to vibrate severely. Almost immediately, a loud bang was heard from the engine compartment. The CFI executed a left turn to return to the airport and received clearance to land.
Forced Landing Sequence
During the approach, a second loud bang occurred, at which time the forward left portion of the engine cowling became distorted. The CFI performed a forced landing in a field. Upon touchdown, the nose landing gear collapsed, and the airplane nosed over.
Postaccident Examination
A postaccident inspection and metallurgical examination were conducted. The examination revealed that the number 2 cylinder had separated between its mounting flange and the cylinder head. The separation was attributed to fatigue.