On July 26, 1996, a Cessna 172M (registration N61842) was involved in an aviation accident near Nez Perce, ID. Investigators recorded the probable cause as: The pilot's failure to ensure adequate climb performance in high density altitude conditions while navigating rising terrain. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A pilot attempted an emergency landing after realizing the aircraft could not climb over rising terrain following takeoff, resulting in a collision with trees.
What happened
Following takeoff, the pilot decided to turn into a valley to establish a more direct flight path toward the intended destination. Once committed to this route, it became apparent that the aircraft lacked the performance capability to climb above the rising terrain ahead. In an effort to avoid the obstacle, the pilot attempted to land the aircraft at the specific point where the aircraft's climb gradient intersected with the ground. During this emergency landing attempt, the aircraft struck trees.
Findings
Subsequent analysis of the flight conditions indicated that the density altitude was approximately 5,000 feet at the time of the incident. This high density altitude likely contributed to the reduced climb performance of the aircraft, preventing it from clearing the terrain despite the pilot's efforts to execute an emergency landing.
Probable cause
The pilot's failure to ensure adequate climb performance in high density altitude conditions while navigating rising terrain.
What happened in the 26 Jul 1996 Cessna 172M accident near Nez Perce, ID?
A pilot attempted an emergency landing after realizing the aircraft could not climb over rising terrain following takeoff, resulting in a collision with trees.
What aircraft was involved and where did it happen?
The accident on 26 Jul 1996 involved a Cessna 172M, registration N61842, at Nez Perce, ID.
What was the probable cause of the accident?
The pilot's failure to ensure adequate climb performance in high density altitude conditions while navigating rising terrain.
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