Federal investigators say the engine of a small plane that crashed into a Plainville home last month killing all three people on board had a breach in the crankcase, two puncture holes near a cylinder and a fractured oil sump.

The preliminary National Transportation Safety Board report released Tuesday also said the left rudder cable and the left aileron cable turnbuckle exhibited overload fractures. The report did not indicate whether the problems occurred pre- or post-crash and did not draw any conclusions on whether they contributed to the crash in Plainville on June 28.

Dr. Joseph Richard Kalister, of Knoxville, Tennessee; his wife, Betty; and their teenage daughter, Nicole, died.

A family of four escaped unharmed from the home.

The pilot reported losing engine power minutes before the crash.