The Merion air disaster occurred in southeastern Pennsylvania on April 4, 1991, when a Piper Aerostar propeller-driven aircraft collided in mid-air with a Bell 412 helicopter over Merion Elementary School in Lower Merion Township, a suburb northwest of Philadelphia. All five people in both aircraft were killed, including United States Senator John Heinz, the sole passenger of the Piper. Two schoolchildren on the ground were killed by falling debris. In addition to the seven total fatalities, five more people on the ground were injured.
A Piper Aerostar similar to the one involved in the accident
A Bell 412EP similar to the one involved in the accident
U.S. Senator John Heinz
In aviation, a mid-air collision is an accident in which two or more aircraft come into unplanned contact during flight. Owing to the relatively high velocities involved and the likelihood of subsequent impact with the ground or sea, very severe damage or the total destruction of at least one of the aircraft usually results.
Contemporary artist's impression of the first mid-air collision, 1910
XB-70 Valkyrie 62-0207 following the mid-air collision on 8 June 1966: The XB-70 can be seen at the far left of the image, missing one of its vertical stabilizers, while the large fireball is the F-104 Starfighter with which it collided.
