On April 15, 1994, an Asher RV-6 (registration N7057G) was involved in an aviation accident near Enterprise, OR. Investigators recorded the probable cause as: The partial loss of power due to a partially blocked induction air filter, which resulted from fragments of insulating material that the builder had wrapped around the exhaust system. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A pilot was forced to land on unsuitable terrain after takeoff when an induction air filter became blocked by insulation fragments from the exhaust system.
Shortly after departing, the aircraft suffered a partial loss of power. The pilot attempted a forced landing on nearby terrain that was not suitable for such an operation.
A post-accident examination of the airframe revealed that the induction air filter was partially obstructed. The blockage was caused by fragments of insulating material. This insulation had been wrapped around the exhaust system during construction.
The partial loss of power due to a partially blocked induction air filter, which resulted from fragments of insulating material that the builder had wrapped around the exhaust system.