Primary finding
Probable cause
The failure of the pilot-in-command to ensure the aircraft was at an adequate altitude above the water before initiating a turn which resulted in the right float contacting the water during the turn and the aircraft cartwheeling.
Investigator assessment
Analysis narrative
The pilot stated the aircraft performance was sluggish for the weight conditions during the takeoff run and initial climb from a channel. After takeoff the aircraft had a shallow rate of climb and as they approached land they encountered glassy water and a downdraft. As he initiated a right turn to remain over water the right float contacted the water and the aircraft cartwheeled and came to rest inverted in the water.
Source record
Factual narrative
On March 26, 1994, about 1045 eastern standard time, a Cessna U206G, N5087R, registered to Key West Seaplane Service, Inc., crashed during takeoff at Key West, Florida, while on a 14 CFR Part 91 pleasure flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft received substantial damage and the airline transport-rated pilot and three passengers received minor injuries. The flight was originating at the time of the accident. The pilot stated the aircraft felt "sluggish" as it accelerated for takeoff. After liftoff the aircraft continued to feel sluggish. The altimeter read 100 feet and the aircraft had a shallow rate of climb. As they flew near shore they encountered glassy water and a down draft from from being on the leeside of a land fill. A right turn was initiated to remain over water at which time the right float contacted the water and the aircraft cartwheeled and came to rest inverted in the water. -