Casualties unknown

Engine Power Loss Due to Carburetor Icing Leads to Forced Landing and Wingtip Contact (N968A)

Enumclaw, WA, US

On March 30, 2007, a Piper PA-22 (registration N968A) operated by Judith Masura was involved in an aviation accident near Enumclaw, WA. Investigators recorded the probable cause as: The pilot's failure to apply carburetor heat during cruise flight. Factors include ambient weather conditions that were conducive to carburetor icing, and soft, muddy terrain at the location where the pilot attempted the power-off forced landing. 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

During cruise flight in conditions conducive to carburetor icing, the engine lost power. The pilot did not apply carburetor heat and switched fuel tanks. A forced landing in a muddy field resulted in wingtip contact with terrain. Post-accident inspection found no engine anomalies.

Overview

The accident occurred during cruise flight when the engine began losing power. Ambient weather conditions were temperature 10°C and dew point 7°C, making the aircraft's carburetor susceptible to icing.

Sequence of Events

When the engine power loss started, the pilot switched fuel tanks but did not apply carburetor heat. Eventually, all engine power was lost. The pilot attempted a forced landing in a nearby field.

During the landing roll, the aircraft encountered soft, muddy terrain. This caused the aircraft to rock from side to side with sufficient amplitude that the wingtips came into contact with the terrain.

Post-Accident Inspection

A post-accident inspection of the engine found no anomalies that would have kept the engine from running under non-icing conditions.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20070501X00492. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.