On March 16, 2001, about 1015 eastern standard time, a Piper PA-28-140, N6532W, piloted by a private pilot, sustained substantial damage on impact with terrain during a simulated forced landing approach to runway 4 at Saint Clair County International Airport (PHN), near Port Huron, Michigan. The flight was operating under 14 CFR Part 91. Visual meteorological conditions prevailed at the time of the accident. No flight plan was on file. The pilot and flight instructor reported no injuries. The local flight review flight had departed from PHN about 0915 and was performing a simulated forced landing at PHN at the time of the accident. The pilot stated, "N6532W departed PHN at 9:15a.m. Friday for a biennial flight review. After extensive training in flight the last maneuver was to be 'Simulated Engine Failure to a Power-Off Landing on Rwy. 04 at PHN'. Three quarters of the way down wind for runway 04@1400 MSL, the flight instructor pulled the throttle to an idle setting. The pilot immediately established best glide speed of 85 m.p.h., turning directly to runway 04. Approximately 75' AGL wind sheer was encountered. The student immediately responded full throttle and nose pitch down. However, the aircraft impacted the ground causing damage to the airframe. Both pilot and CFI walked to terminal to report the incident." The pilot stated that no mechanical malfunction failure occurred. At 0900, the PHN weather was: Wind 030 degrees at 13 knots gusting to 19knots; visibility 10 statute miles; sky condition clear; temperature 0 degrees C; dew point -4 degrees C; altimeter 29.92 inches of mercury.