On May 15, 1988, a Grumman American AA-1B (registration N9601L) operated by Trans Bay Airways Corporation was involved in an aviation accident near San Carlos, CA. Investigators recorded the probable cause as: The fuel pressure line disconnected from a 'T' fitting at the carburetor, causing fuel starvation. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During a post-maintenance test flight, the engine quit, leading to a forced landing in a mud field where the aircraft collided with a dike. Investigation revealed a disconnected fuel pressure line.
Incident Overview
During a post-maintenance test flight conducted prior to the sign-off of an annual inspection, the aircraft's engine experienced a sudden loss of power. The pilot executed a forced landing in a mud field, during which the aircraft collided with a dike.
Examination Findings
Post-incident examination of the engine revealed that a fuel pressure line had become disconnected from a 'T' fitting at the carburetor. This disconnection resulted in fuel starvation, leading to the engine failure.
Maintenance Records Review
Review of the maintenance facility's records indicated that the fuel line had been replaced during the annual inspection. The disconnection likely occurred during or after this replacement.
Probable cause
The fuel pressure line disconnected from a 'T' fitting at the carburetor, causing fuel starvation.
What happened in the 15 May 1988 Grumman American AA-1B accident near San Carlos, CA?
During a post-maintenance test flight, the engine quit, leading to a forced landing in a mud field where the aircraft collided with a dike. Investigation revealed a disconnected fuel pressure line.
What aircraft was involved and where did it happen?
The accident on 15 May 1988 involved a Grumman American AA-1B, registration N9601L, operated by Trans Bay Airways Corporation, at San Carlos, CA.
What was the probable cause of the accident?
The fuel pressure line disconnected from a 'T' fitting at the carburetor, causing fuel starvation.
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