A field investigation report said that the auto-throttle disengaged when take-off mode was selected. Neither pilot noticed that the thrust was set incorrectly, and it wasn't picked up through standard operating procedures.

A review of the software problems affecting the flight showed 11 faults were logged on flight to Las Palmas, though no faults were recorded during a journey to the UK a day earlier.

Boeing told investigators that the auto-throttle system on their 737 Next Generation jets had a "long history of nuisance disconnects during take-off mode engagements" - but that, when investigated, "usually, subsequent functionality checks on the system find no faults".

Voilà qui donne confiance en Boeing, encore une fois.