Accident Overview
A certificated private pilot and one passenger were departing from Lake Hood Airstrip. As the airplane climbed to approximately 100 feet above the runway, all engine power was lost. The airplane subsequently landed in an area of tundra-covered marsh just off the end of the departure runway. During the landing roll, the main wheels contacted the soft, boggy terrain, causing the airplane to nosed over.
Postaccident Inspection
A postaccident inspection of the airplane's carburetor revealed about 10 cubic centimeters (cc) of rusty-colored fluid, along with clean fuel in the carburetor float bowl. The rusty-colored fluid tested positive for water when tested with water detection paste. The fluid sample was released to the accident pilot at his request.
Pilot's Report
The accident pilot reported that the fluid contained therapeutic levels of fluoride, commonly found in tap water. The pilot did not submit the test results report to the National Transportation Safety Board (NTSB).