What happened
The incident occurred when an aircraft began moving unexpectedly during engine start-up procedures. The pilot was not fully familiar with the specific operational characteristics of this particular aircraft model. During the engine start sequence, the pilot failed to properly engage the parking brake system. Additionally, the pilot did not have his feet positioned on the rudder pedals to apply manual braking pressure.
Compounding the situation, a throttle lock device was engaged, which prevented the pilot from reducing engine power as intended. By the time the pilot realized the error and attempted to cut the ignition switch, the aircraft had already gained momentum. It crossed the taxiway boundary and collided with two other aircraft that were parked and unoccupied at the time.
The investigation
Examination of the event revealed a sequence of procedural failures rather than mechanical malfunction. The primary issues identified were the improper setting of the parking brake during engine start and the presence of a throttle lock that inhibited normal power reduction controls. The pilot's lack of familiarity with the aircraft's specific handling characteristics contributed to the delayed reaction time.
Findings
The collision was caused by uncontrolled ground movement resulting from multiple procedural errors. Key contributing factors included:
- Failure to set the parking brake properly before engine start
- Pilot inexperience with this specific aircraft type
- Presence of a throttle lock preventing power reduction
- Lack of foot pressure on braking pedals
The pilot's unfamiliarity with the operation of this aircraft played a significant role in the sequence of events. The inability to quickly reduce throttle due to the lock device extended the time available for the aircraft to accelerate beyond control.