On June 20, 1969, a Beechcraft 99 Airliner (registration N2550A) operated by Cascade Airways was involved in an aviation accident near Pasco, United States of America during takeoff. 2 people were killed. Investigators recorded the probable cause as: Inadequate preflight preparation on part of the pilot and improper operation of flight controls on part of the copilot. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 3 related events involving the same aircraft type or operator are linked below.
Shortly after takeoff from Pasco-Tri-Cities Airport, the airplane entered a high angle of attack, stalled, and crashed in an explosion, killing both pilots. Investigators cited inadequate preflight preparation and improper flight control operation.
Accident Summary
On an unspecified date, an airplane departed from Pasco-Tri-Cities Airport. During the initial climb, the aircraft assumed a nose-high attitude with a high angle of attack. It subsequently stalled and crashed near the airport in a large explosion, resulting in the death of both pilots.
Investigation Findings
Official investigators determined the probable cause of the accident to be inadequate preflight preparation by the pilot and improper operation of flight controls by the copilot. The investigation revealed that after takeoff, the airplane pitched up steeply. Examination of the wreckage showed that the pitch trim was set to the full nose-up position, and the pilot-in-command's seat was unlocked and found in the full aft position. These conditions likely contributed to the loss of control, though the source does not explicitly state a causal link.