On April 30, 1994, a Cessna 172N (registration N739CW) operated by Holman Aviation was involved in an aviation accident near Monarch, MT. Investigators recorded the probable cause as: The pilot's failure to maintain adequate altitude while flying in mountainous terrain, which resulted in a collision with trees after encountering a downdraft. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.
A pilot flying low in a mountainous valley encountered a downdraft that caused the aircraft to lose altitude. Despite applying full power, the plane collided with trees. No mechanical issues were reported.
What happened
The flight was conducted at a low altitude within a valley surrounded by high terrain. During this phase of the operation, the pilot reported encountering a significant downdraft. This meteorological condition caused the aircraft to begin losing altitude rapidly.
In response to the loss of height, the pilot applied full power to the engine in an attempt to regain lift and clear the terrain. Despite the application of maximum thrust, the aircraft was unable to arrest the descent and collided with trees in the area.
The investigation
Following the accident, the pilot provided a statement regarding the condition of the aircraft. It was reported that there were no mechanical failures or malfunctions with the airplane at the time of the accident. This indicates that the loss of performance was likely due to environmental factors rather than equipment failure.
Probable cause
The pilot's failure to maintain adequate altitude while flying in mountainous terrain, which resulted in a collision with trees after encountering a downdraft.
What happened in the 30 Apr 1994 Cessna 172N accident near Monarch, MT?
A pilot flying low in a mountainous valley encountered a downdraft that caused the aircraft to lose altitude. Despite applying full power, the plane collided with trees. No mechanical issues were reported.
What aircraft was involved and where did it happen?
The accident on 30 Apr 1994 involved a Cessna 172N, registration N739CW, operated by Holman Aviation, at Monarch, MT.
What was the probable cause of the accident?
The pilot's failure to maintain adequate altitude while flying in mountainous terrain, which resulted in a collision with trees after encountering a downdraft.
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