On 24 June 1956, a British Overseas Airways Corporation (BOAC) four-engined Canadair C-4 Argonaut airliner crashed into a tree on departure from Kano Airport in Nigeria, three crew and 29 passengers were killed.

[1] The pilot applied full power but the aircraft continued to descend until it hit a tree about 1+1⁄2 miles (2.4 km) from the end of the runway.

[1] A team from the British Ministry of Transport and Civil Aviation and BOAC flew out from London on 25 June in a chartered Canadair Argonaut to help in the investigation.

[3] The Board of Inquiry concluded "The accident was the result of a loss of height and airspeed caused by the aircraft encountering, at approximately 250ft after take-off, an unpredictable thunderstorm cell which gave rise to a sudden reversal of wind direction, heavy rain, and possible downdraft conditions.

"[4] The report also recommended that the International Civil Aviation Organization urgently consider investigating the special hazards to aircraft inherent in taking off or landing in close proximity to thunderstorms.