Aircraft collision with trees during takeoff from off-airport landing area

Casualties unknown • Palmer, AK, US

An aircraft failed to become airborne while departing an 800-foot off-airport landing area, resulting in a collision with trees at the end of the departure path.

What happened

During a departure from an 800-foot off-airport landing area, the unspecified aircraft failed to achieve flight and subsequently collided with trees located at the departure end of the strip. At the time of the accident, the aircraft was 1,268 pounds under its maximum takeoff weight. The pilot, who had operated from this specific location approximately 500 times, reported that winds were calm during the event.

The investigation

Investigators examined the propeller, which had undergone an overhaul 32 hours prior to the accident. Since that overhaul, the aircraft had only been operated from a runway measuring 3,600 feet in length. A test run of the engine and propeller combination had been performed; during the first two tests, the engine failed to reach the design takeoff static RPM required to produce sufficient takeoff power. However, subsequent testing of the engine was reported as normal. Upon disassembly and inspection, the propeller governor showed no detectable defects.

Frequently asked questions

What happened in the 1997-09-30 Pilatus PC-6-350 accident near Palmer, AK?

An aircraft failed to become airborne while departing an 800-foot off-airport landing area, resulting in a collision with trees at the end of the departure path.

What aircraft was involved and where did it happen?

The accident on 1997-09-30 involved a Pilatus PC-6-350, registration N4911, at Palmer, AK.

What was the probable cause of the accident?

An underspeed of the propeller system.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X08778. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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