An emergency Airworthiness Directive issued by Transport Canada yesterday calls for further inspection of Bombardier Q400 main landing gear (MLG) after line checks uncovered two cases of cam mechanism failure in the gear's alternate extension system (AES). The cam mechanism operates the cable to open the main landing gear door and releases the MLG uplock in sequence.
Qantas removed from service five of the 21 Bombardier Q400s operated by regional affiliate QantasLink in late August after the airline found a defect in what it described as a main landing-gear component. Qantas said it decided to inspect the airplanes and ultimately remove them from service after consultation with fellow Q400 operator Flybe and Bombardier.
The high-flying turboprop market shows no sign of losing altitude, as builders on both sides of the Atlantic continue to collect a steady flow of sizable orders from around the globe.