19990602041739A

(.4)The pilot reported that while landing at a privately owned airstrip, the runway 'appeared to be in good shape and dry.' However, when the agricultural airplane's main landing gear touched down, 'the wheels sunk into the soft ground,' and the airplane nosed over onto its back. The pilot reported that the landing area was 'dry in the middle and soft on the sides.' (.19)on June 2, 1999, at 1315 CDT, a Grumman G-164A agricultural airplane, N73PB, owned and operated by double l flying service of wallis, Texas, was substantially damaged during landing near Monaville, Texas. The commercial pilot, sole occipant of the aircraft, was not injuried. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 code ot federal regulations (CFR) part 137 local aerial application flight. According to an FAA inspector, while landing, the aircraft's right main landing gear sunk into the wet landing strip. Subsquently, the aircraft "rollerd over" coming to rest inverted. Examination of the aircraft by the FAA inspector revealed that an upper wing spar, the engine mounts, and the vertical stabilizer were damaged. (-23)pilot landed to the west on grass strip next to dirt road. Main landing gear wheels went through soft mud on rollout. Prop struck ground several times at low RPM until spinner impatched ground. Airplane came to rest upside down. Propeller and spinner sustained minor damage. Upper wing, support struts, vertical stabilizer and rudder sustained substantial damage. Pilot was not injured. Weather was clear, approximately 90 degrees f with wind dircetion and speed undetermined.