On August 30, 2000, an Aeronca 7BCM (registration N66581) operated by Bruce N. Barton was involved in an aviation accident near Santa FE, NM. Investigators recorded the probable cause as: The needle valve in the carburetor stuck in the closed position for unknown reasons. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During approach after a cross-country flight, the pilot applied power but the engine did not respond, leading to an emergency landing on soft terrain. The landing gear separated and the fuselage and wing attachments were damaged. Examination revealed a stuck carburetor needle valve.
Accident Description
While on approach to land at the conclusion of a cross-country flight, the pilot attempted to increase engine power. The engine did not respond to the throttle input. Consequently, an emergency landing was performed on soft terrain that was unsuitable for a normal landing.
Damage
During the emergency landing, the main landing gear separated from the aircraft. The underside of the fuselage was buckled. Additionally, the wing attach points near the wing root were deformed as a result of damage to the forward attachments.
Engine Examination
Subsequent examination of the engine revealed evidence that the needle valve in the carburetor had become stuck in the closed position. The reason for the needle valve sticking could not be determined.
Probable cause
The needle valve in the carburetor stuck in the closed position for unknown reasons.