19990724023879A

(.19) On July 24, 1999, about 1140 eastern daylight time, a Cessna 150, N714HS, was substantially damaged during a forced landing to a field near the central Jersey regional airport (47N), Manville, new Jersey. The certificated private pilot and passenger received minor injuries. Visual meteorological conditions prevailed and no flight plan was filed for the personal local flight conducted under 14 CFR part 91. The pilot stated that he departed 47N at 1105, and remained in the local area for approximately 15 minutes. He then returned to the airport to perform touch and go landings on runway 24. After completing the first landing, full power was added and a climb was initiated. During the climb, at an altitude of approximately 300 feet above the ground, and an airspeed of 62 knots, the pilot noticed that the airspeed "began to decay", and the engine "sounded like it was producing power." The pilot lowered the nose of the airplane in an attempt to gain airspeed, and at 200 feet above the ground, the airspeed had decayed further. The pilot performed a forced landing to a field northeast of his current position. The airplane touched down and impacted terrain, which sheared off the nose gear. The airplane then "lurched over" and came to rest in a nose down attitude. A federal aviation administration inspector reported that the firewall of the airplane was destroyed, the wings and wingtips of the airplane were wrinkled, and the wing spars were crumpled. He stated that the carburetor heat was found in the "on" position and the throttle was retarded. He further stated that the mixture was found "in" and the fuel selector was found in the "off" position. The owner of the airplane drained approximately 11.6 gallons of fuel from the airplane. (.4)after takeoff, the CFI noticed that the airspeed 'began to decay;' however, the engine was still producing power, as he performed a forced landing to a field. After exiting the airplane, the CFI explained to the passenger that they had 'not produced enough power to gain altitude,' because they may have been 'too big' and it was 'too hot' of a day for the airplane to perform. Examination of the engine revealed no pre-impact malfunction, and the carburetor heat control was observed extended in the mid range position, which was consistent to the lever located at the carburetor heat box. Acc ording to the carbuertor heat is in the cold position. The basic empty weight was 1,600 pounds. The passenger and CFI weights were reported as 250 and 200 pounds, respectively. The pilot determined there was 14 gallons of fuel onboard the airplane before takeoff. According to the temperature and elevation reported at the airport, the density altitude was calculated as 1,747 feet. (-23)over gross weight, hot humid day, energency landing off airport, (carb heat pulled on PST emergency landing), wing flaps not used for landing.