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Midair Collision Between Two Glacier Sightseeing Aircraft Ends with Safe Landings (N9735Z)

Taku, AK, US

On June 17, 1990, a Cessna 206U (registration N9735Z) was involved in an aviation accident near Taku, AK. No fatalities were reported. Investigators recorded the probable cause as: FAILURE OF THE PILOT OF N9735Z (C-206U) TO SEE AND AVOID N756EJ (C-206G), AND FAILURE OF COMPANY MANAGEMENT TO ESTABLISH ADEQUATE SEPARATION PROCEDURES. 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 2026-07-04Data APIEditorial standards

Two aircraft from the same operator collided midair while conducting glacier sightseeing operations. Both aircraft landed safely after the collision.

Incident Overview

Two aircraft operated by the same company were conducting glacier sightseeing flights when they collided in midair. Both aircraft had been in frequent radio and visual contact with each other prior to the incident.

Details of the Collision

After the aircraft identified as N9735Z (a Cessna C-206U) exited Sockeye Valley, both aircraft proceeded toward West Twin Glacier at the same altitude and on the same heading. N9735Z then struck the other aircraft, N756EJ (a Cessna C-206G), from behind.

Outcome

Despite the collision, both aircraft landed safely. The investigation did not assign a probable cause.

Midair collision

Frequently asked questions

What happened in the 17 Jun 1990 Cessna 206U accident near Taku, AK?

Two aircraft from the same operator collided midair while conducting glacier sightseeing operations. Both aircraft landed safely after the collision.

Were there any fatalities in the 17 Jun 1990 Cessna 206U accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 17 Jun 1990 involved a Cessna 206U, registration N9735Z, at Taku, AK.

What was the probable cause of the accident?

FAILURE OF THE PILOT OF N9735Z (C-206U) TO SEE AND AVOID N756EJ (C-206G), AND FAILURE OF COMPANY MANAGEMENT TO ESTABLISH ADEQUATE SEPARATION PROCEDURES.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X23303. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.