The 1967 Air Ferry DC-4 accident occurred on 3 June 1967, when a Douglas DC-4 registered as G-APYK on a non-scheduled charter flight between Manston Airport in Kent, England and Perpignan Airport in France hit the Canigou mountain in France, killing all 88 on board.

[1] The cause of the accident was determined to be carbon monoxide poisoning of the flight crew due to a faulty cabin heater.

[3] At 10:04, the aircraft reported to air traffic control at Perpignan that all was well, visibility was good, and that they were beginning to descend.

[4] An investigation by the French Ministry of Transport into the accident concluded that the crash was a result of a series of errors by the crew, but that their irrational behavior was caused by carbon monoxide poisoning from a faulty heater.

Investigators also mentioned language difficulties between the crew and the Perpignan controller, and that radio directional finding equipment not being used to determine the aircraft's location may have aggravated the circumstances.