On January 22, 1995, a Cessna 177 (registration N29598) was involved in an aviation accident near Auburn, WA. Investigators recorded the probable cause as: Obstruction of the carburetor venturi by a piece of neoprene induction air ducting ingested into the carburetor. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
Witnesses reported black smoke after takeoff. The aircraft lost power, prompting a forced landing in a field. Substantial damage occurred on soft terrain. Investigation found a piece of neoprene ducting obstructing the carburetor venturi.
Event Summary
Following takeoff, witnesses observed black smoke emanating from the aircraft. Shortly thereafter, the aircraft experienced a loss of power. The pilot executed a forced landing into an open field. During the landing, the aircraft encountered soft terrain, which resulted in substantial damage to the aircraft.
Investigation Findings
During the subsequent investigation, a piece of neoprene induction air ducting measuring 1/2 inch by 1 1/2 inches was discovered inside the carburetor. The ingested ducting had caused an obstruction of the carburetor venturi, which led to the loss of engine power. The source of the ducting and the circumstances of its ingestion were not specified in the available information.
Probable cause
Obstruction of the carburetor venturi by a piece of neoprene induction air ducting ingested into the carburetor.