On May 2, 1997, at about 0125 eastern daylight time, N1044P, a Piper PA-23, operated by the commercial pilot, sustained substantial damage after impacting trees about 1000 feet short of runway 010 while executing an emergency landing/approach to Washington Dulles International Airport, Washington, DC. The pilot stated that both engines failed. The pilot and one passenger his wife, sustained minor injuries. Visual Meteorological conditions existed and an Instrument flight rules (IFR) flight plan was filed. The flight was conducted under the provisions of Title 14 CFR Part 91. The flight originated from the Lake in the Hills Airport, Lake in the Hills, Illinois, at about 2030 EDT on May 1, 1997. The pilot stated that while enroute to Washington's National Airport, the right engine quite. He contacted Air Traffic and they vectored him to Dulles International Airport. The pilot stated that he had Dulles insight when the left engine quit. The pilot notified Air Traffic that they were not going to make the runway and crashed into the tops of trees and came to rest nose down in the trees. The pilot stated the in the course of his flight planning he mistakenly read the fuel quantity for the aircraft as 108 gallons, which is the quantity for the auxiliary tank configuration. The pilot stated that he failed to catch his mistake until after the accident had occurred.