Which bomber had a wing so thick that the engines could be accessed in flight?

The Amiot 143 had a wing so thick that the crew could reach the engines through a tunnel open between the spars. It kept the high-wing configuration and fixed landing gear of the preceding Amiot 140. That 140M was an undeniably ugly aircraft, with a rectangular fuselage, a large thick wing, a clumsy nose and a large glazed gondola beneath the structure, though it delivered the performance the Armée de l'Air required. The design stemmed from a 1928 French Air Ministry specification calling for a four-seat, multi-purpose, all-metal twin-engined monoplane.

The initial contracts were followed by a further 73 aircraft ordered in April 1935, with a lengthened fuselage, and 25 more at the end of 1936, when the Amiot 144 was cancelled, for a total of 138 aircraft. Deliveries began in April 1935 and continued until March 1937.

During the Phoney War, the groupes equipped with the Amiot 143 flew reconnaissance missions and leaflet-dropping raids over Germany.