Casualties unknown

1986-08-08: Hughes 369D (N1110Z) — Clark, CO

Clark, CO, US

On August 8, 1986, a Hughes 369D (registration N1110Z) was involved in an aviation accident near Clark, CO. 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 1781061362Data APIEditorial standards

The pilot reported that after departing from a tree-surrounded landing zone, the helicopter began to settle as it climbed above trees due to a wind change. The descent could not be stopped, and after landing, the helicopter struck trees. Density altitude was 12,180 feet.

Accident Details

The pilot of the helicopter reported an accident that occurred during a departure from a landing zone surrounded by tall trees. After lifting off, the helicopter climbed above the trees. At that point, the wind either shifted direction or stopped entirely. Consequently, the helicopter began to settle, experiencing a descent. The pilot was unable to stop the descent and subsequently landed the aircraft in an open area. Following touchdown, the helicopter struck several trees.

Pilot's Account

In a statement made after the accident, the pilot described the landing zone as being encased by tall trees. He noted that after liftoff, as the helicopter gained altitude and cleared the tree line, the wind conditions changed abruptly—either shifting direction or ceasing. This caused the helicopter to enter a settling condition. Despite the pilot's efforts, he could not halt the descent. The helicopter was then landed in an open area, and after touching down, it impacted several trees.

Environmental Conditions

The density altitude at the accident site was calculated to be 12,180 feet. This figure was included in the pilot's statement.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X34459. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.