Examination of the wreckage showed that all the trailing edge flaps were in the up position, as was the flap handle.

What could happen if, for example, another pilot raised the leading edge flaps of a large aircraft by mistake?

The wings were fitted with trailing edge flaps and fixed leading edge slots.

A long trailing edge flap could be raised, but not lowered, to steepen descents.

Early aircraft had a clean wing leading edge with no control surfaces, and plain trailing edge flaps.

The cause of the crash was determined to be a stall caused by the leading edge flaps having been left in retracted position.

The elevation and temperature at the airport were within the capability of the 747, but only with leading and trailing edge flaps extended.

It was fitted with leading edge slats, which were linked to trailing edge flaps.

Examination of the wreckage showed that the trailing edge flaps were not extended.

Split trailing edge flaps were fitted for use on landing only.