Casualties unknown

Gravel Bar Takeoff Results in Tree Strike Due to Crosswind and Terrain (N2106A)

Mcgrath, AK, US

On September 24, 1998, a Piper PA-20 (registration N2106A) operated by Paul Downes was involved in an aviation accident near Mcgrath, AK. Investigators recorded the probable cause as: The pilot's failure to maintain directional control during takeoff due to a left crosswind and terrain irregularities, which resulted in the aircraft striking a tree and a stump. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-21Data APIEditorial standards

A private pilot experienced difficulty during takeoff from a gravel bar, where a left crosswind and terrain irregularities caused the aircraft to bounce and drift right into a tree.

What happened

The incident occurred while a private pilot was attempting to depart from a gravel bar. The available runway area was notably narrow and free of obstructions, but the pilot reported the presence of a left crosswind during the operation. As the aircraft accelerated down the takeoff run, it encountered a berm on the surface. This irregularity caused the airplane to bounce upward into the air. Upon landing or remaining airborne after the bounce, the aircraft drifted toward the right side of the path. During this drift, the right wing struck a tree, and simultaneously, the left tire became hooked on a stump, halting the forward motion.

The investigation

The physical evidence indicated that the takeoff surface presented challenges due to its natural state as a gravel bar. The presence of a berm was identified as a critical factor during the ground roll. The interaction between the aircraft and the terrain features, specifically the berm and the subsequent contact with vegetation and stumps, resulted in the cessation of the flight.

Findings

The sequence of events suggests that the combination of a narrow takeoff area, a left crosswind condition, and an uneven surface contributed to the loss of control or directional stability during the critical phase of flight. The bounce caused by the berm likely compromised the pilot's ability to maintain the intended track, leading to the rightward drift into obstacles.

Probable cause

The pilot's failure to maintain directional control during takeoff due to a left crosswind and terrain irregularities, which resulted in the aircraft striking a tree and a stump.

Frequently asked questions

What happened in the 24 Sept 1998 Piper PA-20 accident near Mcgrath, AK?

A private pilot experienced difficulty during takeoff from a gravel bar, where a left crosswind and terrain irregularities caused the aircraft to bounce and drift right into a tree.

What aircraft was involved and where did it happen?

The accident on 24 Sept 1998 involved a Piper PA-20, registration N2106A, operated by Paul Downes, at Mcgrath, AK.

What was the probable cause of the accident?

The pilot's failure to maintain directional control during takeoff due to a left crosswind and terrain irregularities, which resulted in the aircraft striking a tree and a stump.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X10989. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.