Background
During a fly-in event, the airstrip owner advised the pilot of a Boeing E75 (registration N43320) to use a right traffic pattern for landing, citing the number of aircraft involved. Meanwhile, a Cessna 150 (registration N2660J) was arriving from another airport and entered a left traffic pattern for landing on the same runway. Neither a traffic pattern indicator nor a UNICOM radio were installed at the airstrip.
Collision
As the Boeing E75 followed a right pattern and the Cessna 150 followed a left pattern, both aircraft converged on final approach and collided. Just before the collision, the Cessna 150 was below the Boeing E75. Both pilots were monitoring the same radio frequency of a nearby airport, but neither transmitted their intentions for landing.
Aftermath
Both aircraft touched down hard and sustained substantial damage. The occupants of both aircraft received minor injuries. According to the Airman's Information Manual, all turns in the traffic pattern should have been made to the left while approaching to land, unless a traffic pattern indicator indicated otherwise. No such indicator was present at the airstrip.