NTSB Identification: LAX00LA049.
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Accident occurred Sunday, December 05, 1999 in CHULA VISTA, CA
Probable Cause Approval Date: 08/21/2001
Aircraft: Corbin/King OSPREY 2, registration: N192DC
Injuries: 1 Fatal.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The airplane came to rest in a lake after witnesses heard a loud noise. They saw the airplane in a tight spiral and pieces of it were floating in trail. The engine sound changed from a loud to a softer tone as the airplane rotated. Earlier in the afternoon, the pilot had visited a retired FAA inspector in Ramona, California, where he had appeared to be in good health and spirits. The inspector looked at the airplane prior to departure and did not notice anything unusual. The engine sounded good and was running strong when it taxied away from his hangar. Both wings and the fuselage/tail assembly were found floating. The left wing and canopy were lightly damaged. The left wing fractured and separated near the fuselage in a downward direction. The rest of the airplane was highly damaged and fragmented. Investigators established flight control continuity. They established engine valve train and accessory gear continuity. The oil screen was clean and the spark plug color indicated normal operation. They discovered no discrepancies that would have precluded normal operation of the airframe or engine. Toxicological testing returned a positive result for amitriptyline and nortriptyline. Amitriptyline is one of the most sedating of the antidepressants, and is given almost exclusively in the evenings because of these effects. The levels found in the pilot's blood suggested regular use of a low dosage of the medication as he and his doctor had previously described in the application for his airman's medical certificate. It is unclear what effect, if any, such low levels would have on the pilot's performance. The nature of the accident does not suggest that the medication played a significant role. However, it is possible that the medication and/or the condition for which it was being taken resulted in less than optimum response to an evolving emergency condition.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The pilot exceeded the design stress limits of the airplane resulting in wing overload and separation.

Full narrative available

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