The Bell 407 is a four-blade, single-engine civil helicopter. It has featured in incidents involving midair collisions, plus ongoing maintenance and safety discussions around helicopter operations.
A Cessna 150 collides with a Pennsylvania State Police Bell 407 helicopter at Carlisle Airport, killing the Cessna pilot and injuring two troopers. The crash occurred during a training hover near the runway; investigators are assessing aircraft, pilot actions, and conditions.