On September 7, 2003, a Cessna 180D (registration N6445X) was involved in an aviation accident near Greenville, ME. Investigators recorded the probable cause as: The inadequate installation and inspection of an aileron cable by maintenance personnel, which resulted in a loss of control in-flight and subsequent collision with water. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During a seaplane refresher course, a private pilot lost aileron control on takeoff, leading to impact with the lake. Investigation found a separated, un-safety-wired turnbuckle on the right aileron cable.
Incident Summary
A private pilot, receiving a refresher course in seaplane flying, was at the controls during the fifth takeoff of the day. As the airplane lifted off from the lake, the pilot observed a loss of aileron control. The flight instructor then assumed control, but the airplane rolled to the right, impacted the water, and sank to a depth of 60 feet.
Investigation Findings
Examination of the wreckage revealed that a turnbuckle had separated from the right aileron cable. The turnbuckle was not safety-wired. The airplane had accumulated approximately 55 hours of operation since its last annual inspection. Review of the engine maintenance logs showed an entry indicating replacement of the left and right aileron control cables and the aileron carry-through cable, along with rigging adjustments. The entry was signed with a certification that the aircraft had been inspected in accordance with an annual inspection and determined to be in an airworthy condition.
Frequently asked questions
What happened in the 7 Sept 2003 Cessna 180D accident near Greenville, ME?
During a seaplane refresher course, a private pilot lost aileron control on takeoff, leading to impact with the lake. Investigation found a separated, un-safety-wired turnbuckle on the right aileron cable.
What aircraft was involved and where did it happen?
The accident on 7 Sept 2003 involved a Cessna 180D, registration N6445X, at Greenville, ME.
What was the probable cause of the accident?
The inadequate installation and inspection of an aileron cable by maintenance personnel, which resulted in a loss of control in-flight and subsequent collision with water.
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