BOMBARDIER INC CL-600-2B16Ace Aviation Services

The pilot’s improper response to a loss of power in the No. 2 engine and his failure to ensure that the airplane was airworthy. Contributing to the accident was the inadequate engine maintenance by the operator's maintenance personnel.

A partial loss of engine power shortly after takeoff for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation and the pilot’s failure to maintain airplane control during the unsuccessful attempt to return for landing on the airport. Contributing to the accident was the pilot’s decision to conduct his second takeoff using less than the full runway length available and the airline’s lack of guidance regarding how to respond to en…

The pilot’s failure to secure and feather the left engine and increase power on the right engine after a perceived loss of engine power in the left engine, which resulted in a loss of control and impact with terrain just short of the runway. Contributing to the accident was a reduction in engine power from the left engine due to a 1st stage turbine blade midspan separation and material loss in the 2nd stage stator that were the result of engine operation at high temperatures for an extended period of time.

The total loss of engine power as a result of a fractured compressor turbine blade due to high-cycle fatigue.

The failure and separation of a section of the No. 2 engine's combustion chamber's small exit duct (SED), which created an airflow disruption that led to an engine surge and subsequent fire. Contributing to the accident was the insufficient weld penetration that remained totally contained within the SED outer dome and did not penetrate through to the inner duct as required by the manufacturing specifications.