Casualties unknown

Floatplane Rolls Over During Takeoff in High Winds (N700NL)

Iliamna, AK, US

On September 19, 1998, a DE Havilland DHC-2 (registration N700NL) was involved in an aviation accident near Iliamna, AK. Investigators recorded the probable cause as: The pilot's failure to maintain control during takeoff in strong, gusting winds. 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 2026-06-10Data APIEditorial standards

A float-equipped aircraft overturned during takeoff from a remote lake due to strong gusting winds that lifted one wing unexpectedly.

What happened

The pilot was attempting a takeoff to the east from a remote lake using a float-equipped airplane. Conditions were challenging, with the pilot estimating prevailing easterly winds at 35 knots and gusts reaching up to 55 knots. Shortly after applying power during the initial takeoff roll, a sudden gust of wind lifted the right wing. This unexpected lift caused the airplane to roll over to the left side.

The investigation

The investigation focused on the immediate circumstances of the accident. The pilot's report indicated that the rollover was triggered by a specific wind gust during the critical takeoff phase. No mechanical failures were reported prior to the event.

Probable cause

The pilot's failure to maintain control during takeoff in strong, gusting winds.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X10988. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.