BOAC Flight 712

BOAC Flight 712 (callsign Speedbird 712) was a British Overseas Airways Corporation service operated by a Boeing 707-465 from London Heathrow Airport bound for Sydney, Australia via Zurich and Singapore. On Monday 8 April 1968, it suffered an engine failure on takeoff that quickly led to a major fire. The engine fell off the aircraft in flight. After the aircraft had made a successful emergency landing, confusion over checklists and distractions from the presence of a check captain contributed to the deaths of five of the 127 on board.

The actions taken by those involved in the accident resulted in the award of a George Cross, a British Empire Medal and an MBE. As a direct result of the accident, BOAC changed the checklists for engine severe failures and engine fires, combining them both into one checklist, the "engine fire or severe failure" checklist.