On April 21, 1999, a Cessna R182 (registration N7317X) was involved in an aviation accident near San Luis Obispo, CA. Investigators recorded the probable cause as: The inadequate preflight inspection of the aircraft by the pilot-in-command which resulted in a loss of engine power due to water contamination in the fuel system. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A pilot made an emergency landing in a field after engine power loss while descending through clouds. Investigators found clear fluid resembling water in the fuel sump and a blocked tank drain.
Occurrence
The pilot reported that while approximately 6 miles northwest of the airport and returning for landing, the engine abruptly and completely stopped producing power. The aircraft descended through a stratus cloud layer and emerged below a 900-foot ceiling. Determining that the aircraft would not be able to glide to the airport, the pilot executed an emergency landing in an open field adjacent to a highway. During the landing, the right wing struck a sign.
Investigation
FAA inspectors examined the aircraft after the event. The engine fuel sump was found to contain a clear fluid resembling water. Additionally, the right-hand fuel tank sump drain was fitted with a threaded plug, which prevented routine sampling of that tank for water contamination.
What happened in the 21 Apr 1999 Cessna R182 accident near San Luis Obispo, CA?
A pilot made an emergency landing in a field after engine power loss while descending through clouds. Investigators found clear fluid resembling water in the fuel sump and a blocked tank drain.
What aircraft was involved and where did it happen?
The accident on 21 Apr 1999 involved a Cessna R182, registration N7317X, at San Luis Obispo, CA.
What was the probable cause of the accident?
The inadequate preflight inspection of the aircraft by the pilot-in-command which resulted in a loss of engine power due to water contamination in the fuel system. A factor in the accident was an improper maintenance alteration which disabled a fuel sump drain.
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