Bombardier said a preliminary investigation revealed some corrosion on a part of the landing gear that failed on an SAS Q400 earlier this week. A spokesperson told ATWOnline that the corrosion was evident on the landing gear actuator, which extends and retracts the gear during landing and takeoff. The Canadian manufacturer recommended that all Q400s be grounded after landing gears collapsed on two separate SAS flights on Sept. 9 and Sept. 12 (ATWOnline, Sept. 13). "The aircraft touched down ...

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