Accident Kolb Mark III N350RB, Saturday 20 September 2008
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Date:Saturday 20 September 2008
Time:07:55 LT
Type:Kolb Mark III
Registration: N350RB
MSN: 299
Total airframe hrs:220 hours
Engine model:Rotax 912
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:East Haddam, Connecticut -   United States of America
Phase: Standing
Departure airport:East Haddam, CT (42B)
Destination airport:East Haddam, CT (42B)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The pilot stated that he conducted a preflight inspection, and an engine run-up before departing. He added 1.5 to 2 gallons of automotive gasoline to the fuel tank; however he did not stick the fuel tanks or check to see if there was any water present in the fuel tanks. He turned the boost pump on, and departed from runway 14. The airplane was on initial takeoff climb, about 300 feet when the engine sputtered and lost power. He immediately turned the airplane to the right in order to return to the airport, and the airplane collided with trees and came to rest inverted on the ground. Examination of both fuel tanks revealed the fuel tanks were not ruptured and the fuel caps had a tight seal. The airplane is not equipped with fuel sump drains. Examination of the fuel system revealed all fuel lines were intact and correctly routed. Water was present in the fuel lines and the carburetor bowls. The spark plugs were removed and the propeller was turned by hand. Compression and suction was available on all cylinders and engine continuity was confirmed from the forward section of the engine aft to the accessory case. Fire department personnel who responded to the accident site stated no water was used on the airplane.

Probable Cause: The pilot's improper preflight inspection of the airplane. Contributing to the accident was water contamination of the fuel.

Accident investigation:
Investigating agency: NTSB
Report number: MIA08LA197
Status: Investigation completed
Duration: 4 months
Download report: Final report




Revision history:

02-Oct-2022 11:37 ASN Update Bot Added

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