On September 15, 1993, about 1235 hours eastern daylight time, N11689, a Bellanca 7GCBC airplane on floats, operated by the owner/pilot, impacted terrain while maneuvering and was substantially damaged. The certificated private pilot was not injured and the passenger received minor injuries. Visual meteorological conditions prevailed and a flight plan was not filed. The aerial observation flight departed from the Penopscot River near Medway, Maine, and was conducted under 14 CFR 91. According to a Federal Aviation Administration (FAA) aviation safety inspector, the private pilot was flying the local chief of police around the area at about 400 feet above the ground to search for marijuana plants. The pilot stated that he "turned from a headwind to a tailwind, and lost . . . lift." The pilot further stated, "I thought it was a gust, not a stall, so I corrected for a gust. I didn't lower the nose in time, causing an aggravated stall. The plane started to turn to the left, and hit the ground before I could totally correct." The pilot did not report any mechanical malfunctions. An examination of the wreckage by the FAA inspector at the accident site did not reveal any evidence of pre-impact mechanical deficiencies.