the improper entry into the traffic pattern by the pilot of the Piper airplane and the inadequate lookout by the pilots in both airplanes. A factor in the accident was that radio communication was not possible because the Piper was not so equipped, and the Bellanca's radios were turned off.

THE LOSS OF CONTROL AND COLLISION WITH A PARKED AIRCRAFT DUE TO THE INADVERTENT APPLICATION OF THE THROTTLE THAT TOOK PLACE AS THE PILOT WAS FASTENING THE OVER THE SHOULDER SAFETY HARNESS WHILE WARMING THE ENGINE IN PREPARATION FOR DEPARTURE.