On June 29, 1994, about 1100 eastern daylight time, a Beech C23, N9313S, was substantially damaged during landing at the Easton/Newnam Field Airport, Easton, Maryland. The Certified Flight Instructor and student pilot were not injured. Visual meteorological conditions prevailed and a flight plan was not filed. The flight was being conducted under CFR 14 Part 91. The local area instructional flight was being operated by Maryland Air of Easton. In the NTSB form 6120.1/2, the flight instructor stated, ...On final approach to runway 22, the student pilot had established a stabilized approach with full flaps, correct approach speed and power setting, and a constant rate of descent. After clearing the 50' obstacle (simulated) and preparing to flare for landing, the student pilot retracted the flaps. He immediately realized his error and re-extended the flaps, his hand not having left the flap mechanism, while I, closely followed by Mr. Hafer [(the student pilot)], reached to the throttle to add power. However, the airplane had been too close to the ground to prevent its rapid sinking to the runway, and consequent hard landing during which the nose gear collapsed.... The airplane came to rest nose down on the runway. Postaccident examination by a Federal Aviation Administration Inspector, revealed no discrepancies.