On August 11, 1990, a Cessna 180 (registration N52098) operated by John D Amundsen was involved in an aviation accident near Soldotna, AK. Investigators recorded the probable cause as: The pilot's failure to ensure the aircraft was adequately fueled prior to flight, as evidenced by the insecure attachment of the right fuel bladder bottom which caused fuel siphoning and engine failure. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
An aircraft experienced an engine failure after the pilot observed fuel siphoning from the right tank filler cap, leading to a forced landing in trees.
What happened
The airplane executed a forced landing into a wooded area following an unexpected engine failure. Approximately five minutes prior to the loss of power, the pilot reported visually observing fuel siphoning emanating from the right fuel tank filler cap. Upon inspection after the incident, it was determined that the bottom of the right fuel bladder was not securely fastened. The pilot stated that the fuel tanks were nearly empty immediately following the accident.
The investigation
Examination of the aircraft revealed that the bottom of the right fuel bladder was not securely fastened. This mechanical failure allowed fuel to escape, contributing to the engine failure.
Findings
The primary factor in this incident was the insecure attachment of the right fuel bladder bottom, which led to fuel siphoning and subsequent fuel exhaustion. The pilot's observation of the siphoning provided critical context for the sequence of events leading to the forced landing.
Probable cause
The pilot's failure to ensure the aircraft was adequately fueled prior to flight, as evidenced by the insecure attachment of the right fuel bladder bottom which caused fuel siphoning and engine failure.
What happened in the 11 Aug 1990 Cessna 180 accident near Soldotna, AK?
An aircraft experienced an engine failure after the pilot observed fuel siphoning from the right tank filler cap, leading to a forced landing in trees.
What aircraft was involved and where did it happen?
The accident on 11 Aug 1990 involved a Cessna 180, registration N52098, operated by John D Amundsen, at Soldotna, AK.
What was the probable cause of the accident?
The pilot's failure to ensure the aircraft was adequately fueled prior to flight, as evidenced by the insecure attachment of the right fuel bladder bottom which caused fuel siphoning and engine failure.
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