No fatalities

PIPER PA-18 NO SERIES accident at Palmer, AK, 26 Nov 2021

Palmer, AK, United States

On November 26, 2021, a PIPER PA-18 NO SERIES was involved in an aviation accident near Palmer, AK. No fatalities were reported. Investigators recorded the probable cause as: The pilot’s failure to effectively use carburetor heat in conditions conducive to the formation of carburetor ice, which resulted in a partial loss of engine power, off-airport landing, and nose over. 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 pilot’s failure to effectively use carburetor heat in conditions conducive to the formation of carburetor ice, which resulted in a partial loss of engine power, off-airport landing, and nose over.

— NTSB Determination

Contributing factors

PilotEffect on operationIncorrect use/operation