皇冠体育app

Boeing 737-33A, G-ZAPZ

Summary:

An onboard hand-held Electronic Flight Bag (EFB) computer was used to calculate the aircraft鈥檚 takeoff performance. 皇冠体育app commander omitted to enter the aircraft鈥檚 takeoff weight into the performance calculation software, which defaulted to the previous flight鈥檚 takeoff weight. 皇冠体育app crew did not cross-check the data and incorrect speeds and thrust were calculated and subsequently used for the takeoff. As a consequence, the airspeed at rotation was too low and the pitch angle was sufficient to strike the tail on the runway. A broken spring within the aircraft鈥檚 elevator feel and centering unit caused reduced resistance in the flight controls in pitch, contributing to the excessive pitch attitude achieved during rotation.

皇冠体育app investigation also revealed wider issues relating to the general design and use of EFB computers to calculate performance data. Two Safety Recommendations are made.

Download report:

(1,608.13 kb)