On February 14, 1995 about 1215 eastern standard time, a Cessna 152, N89712, operated by Gibson Air Academy Inc. and piloted by John Impaglia was substantially damaged during a forced landing on a field in Colts Neck, New Jersey. The instructor and student pilot received minor injuries. Visual meteorological conditions prevailed. The flight was being conducted under 14 CFR Part 91. The instructor stated, they departed Allaire, New Jersey on a local flight. After practicing some maneuvers, they descended to 1500 feet mean sea level (msl). They leveled at 1500 feet msl, with the intent to conduct ground reference maneuvers and the flight instructor noticed a loss of power. The instructor verified that the student did not inadvertently reduce the power. The instructor used emergency procedures but the engine continued to lose power. The instructor executed a forced landing on a field. During the landing the airplane crossed a ditch and nosed over. The post accident engine inspection was performed by Leonard Boyd, Chief Inspector at Monmouth Aircraft Service, Inc., the company that provided maintenance for this airplane on a regular basis. According to Leonard Boyd, no anomalies were found other than the float valve in the carburetor was sticky, and was undetermined if it was from impact damage.