BOMBARDIER CL600PSA AIRLINES INC

The pilot's failure to remove the flight control lock prior to takeoff. Contributing to the accident was the Federal Aviation Administration's failure to issue an airworthiness directive making the manufacturer's previously-issued flight control lock service bulletins mandatory.

Failure of the tow bar shear pin, which resulted in the tug operator’s loss of control of the airplane during pushback operations. Contributing to the accident was the tug operator’s inability to communicate to the flight crew to apply the airplane’s brakes.

The captain’s inadvertent aggressive application of the brakes during taxi which resulted in a sudden stop. Contributing to the accident was the flight attendants’ failure to notify the flight crew of the unsecure cabin.

The local controller's failure to visually scan and ensure that the runway surface was not occupied by a vehicle or other aircraft before issuing a takeoff clearance to the pilot. Contributing to this incident was the relieved controller's failure to monitor and review the position, after completing the relief briefing, to ensure that nothing had been overlooked.

The flight crew's delayed deployment of the speedbrakes and thrust reversers, resulting in insufficient runway remaining to bring the airplane to a stop. Contributing to the delay in deployment of these stopping devices was the flight crew's inadequate monitoring of the airplane's configuration after touchdown, likely as a result of being distracted by a perceived lack of wheel braking effectiveness. Contributing to the incident was the flight crew's omission of the Before Landing checklist, which includes an…