No fatalities

AVIAT AIRCRAFT INC A-1B accident at Matanuska Glacier, AK, 13 Jul 2023

Matanuska Glacier, AK, United States

On July 13, 2023, an AVIAT AIRCRAFT INC A-1B was involved in an aviation accident near Matanuska Glacier, AK. No fatalities were reported. Investigators recorded the probable cause as: The airplane’s encounter with downdrafts resulting in decreased performance insufficient to outclimb rising terrain. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards

Probable cause

The airplane’s encounter with downdrafts resulting in decreased performance insufficient to outclimb rising terrain.

— NTSB Determination

Contributing factors

PilotClimb rate — Not attained/maintainedContributed to outcome