FAA proposes Challenger thrust control airworthiness directive

The FAA is proposing an airworthiness directive for variants of the Bombardier Challenger 600 and 601. There have been several reported incidents of jamming/malfunctioning of the left-hand engine thrust control mechanism on the affected airplanes. The investigation has shown that an improperly stowed or dislodged upper core cowl door hold-open rod can impede a fuel control unit function by obstructing the movement of the FCU actuating lever arm, rendering the left-hand engine thrust control inoperable.