On August 6, 2005, at 1900 central daylight time, a Grumman
G-164, N636U, was destroyed by impact with the terrain and post
impact fire during a forced landing after a loss of power during
takeoff from runway 30 at the Marshalltown Municipal Airport
(MIW), Marshalltown, Iowa. The pilot received minor injuries.
The 14 Code of Federal Regulations Part 137 aerial application
flight was departing MIW on a local flight. Visual
meteorological conditions prevailed at the time of the accident.
No flight plan was filed.  The pilot reported that he completed
the sixth spray load of the day and he landed at MIW to refuel
and take on chemicals. He reported that he topped off the fuel
tanks and loaded about 115 gallons of pesticide water mix. He
reported that he taxied to the end of runway 30 and performed an
engine run-up and control check. He reported that the airplane
was functioning normally when he departed. He reported that at
approximately 100 feet above ground level (agl) at the departure
end of the runway, the en