NTSB Identification: CHI02FAMS1.
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Accident occurred Sunday, December 09, 2001 in Lake Michigan, IL
Probable Cause Approval Date: 04/28/2004
Aircraft: Cessna R182, registration: N2359C
Injuries: 4 Fatal.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
The airplane was destroyed during an in-flight collision with water following a rapid descent from 2,400 feet msl. The descent lasted approximately 32 seconds and the average and maximum descent rates were about 2,600 feet/min and 4,200 feet/min, respectively. A commercial salvage company located the wreckage debris field approximately eight months after the accident. The center of the debris field was approximately 1,500 feet east of the last recorded radar track position. The debris field was approximately 550 feet square and contained airframe structural components, avionics, engine exhaust components, and personal artifacts for at least two occupants. The main wreckage was not recovered. The only components salvaged were the cabin heat muff/shroud, carburetor heat muff, and assorted avionic equipment. The serial numbers for the recovered avionic equipment established that the wreckage was from N2359C. The recovered engine exhaust components were examined and no discrepancies were identified to have been present prior to the accident.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The uncontrolled descent for undetermined reasons.
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