20170709024789A

N2429C, Cessna 180 on floats, owned by private owner, took off from lake hood @ approximately 12PM. The pilot had taken on approximately 57 gallons of fuel from international aviation fuels prior to take off. The aircraft took off to the north with 20 degrees of flaps and climbed to an altitude of 500FT. The pilot attempted to retract the flaps but the flaps would not retract. Pilot made a right hand turn for downwind leg to make a return landing at lake hood. The pilot noted he was doing approximately 75 knots. As the pilot attempted to trouble shoot his flap issue, the engine quit. Pilot stated that the prop was wind milling. With no power and a 20 degree flap setting, the pilot looked for a place to land, but because of the flap malfunction he was afraid to stall the aircraft. The aircraft took a path parallel to cosmic circle, hitting an approximately 35 ft pine tree, a light post and finally the duplex on the corner of cosmic circle and orion circle, coming to rest on orion circle. The pilot stated he turned off the battery and exited the aircraft. Airport police arrived (case # 17-0669), along with Anchorage fire department. I arrived at the scene at approximately 1310 hrs. Myself and an NTSB investigator interviewed the pilot, took pictures, gathered parts of the aircraft strewn for approximately 1 block, secured the aircraft and waited for a local trucking company to remove the wreckage and deliver it to a secure location. I did recover the logbooks for the aircraft from the owner.