Accident Kolb Mark III N9144E, Wednesday 5 October 2011
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Date:Wednesday 5 October 2011
Type:Kolb Mark III
Registration: N9144E
MSN: MT99400017
Engine model:Rotax 582
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Location:In a bean field between Fortuna and Versailles, MO -   United States of America
Phase: En route
Departure airport:Versailles, MO
Destination airport:Versailles, MO
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The pilot stated that the accident occurred on his sixth flight in the airplane. The engine run-up for the accident flight was normal, and just after takeoff, the engine over-temperature warning light illuminated. He banked the airplane to return to the airstrip. He said he decreased the engine power to keep the temperatures down but then had to increase engine power and pitch in order to clear trees along the flight path. The engine subsequently stopped producing power. The landing gear was ripped off during the forced landing in a field and the pilot was dragged across the terrain while still in the sling-type seat, which resulted in the pilot sustaining serious back injuries.

After purchasing the airplane, the pilot installed a new engine, a ballistic recovery chute, a new fuel tank, and new fuel lines. However, he stated that he had continuing problems with high engine temperatures and a high static engine rpm. In response to these problems, the pilot replaced the static jets in both carburetors, tuned and synchronized both carburetors, and replaced the heat probes. He also installed an engine information system.

A postaccident examination of the engine and airplane revealed that both carburetors were not adjusted properly, thus restricting fuel flow; improper fuel jets were installed, which produced a richer fuel/air mixture; and the coolant water temperature probe was in the wrong location, which would have prevented accurate temperature sensing. In addition, the positions of the air deflectors, the ballistic recovery chute, and the oil injection reservoir may have affected the amount of cooling air to the engine. No evidence of internal damage was noted to the pistons and cylinders. The engine demonstrated the ability to run normally during postaccident testing. Although the exact cause of the loss of engine power was not determined, it is likely that a combination of the modifications that were made to the airplane and engine that resulted in the loss of engine power.
Probable Cause: A loss of engine power due to adjustments and modifications that the pilot made to the engine and airplane.

Accident investigation:
Investigating agency: NTSB
Report number: CEN12LA008
Status: Investigation completed
Duration: 1 year 1 month
Download report: Final report


FAA register:


Revision history:

06-Oct-2011 23:34 Geno Added
07-Oct-2011 00:14 RobertMB Updated [Aircraft type, Operator, Location, Source, Narrative, Plane category, ]
21-Dec-2016 19:26 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
27-Nov-2017 17:21 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative, Plane category]

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