Accident Details
During the arrival phase of a Part 135 instrument flight rules (IFR) operation, the pilot of aircraft N33670 was provided radar vectors and cleared for an ILS approach to runway 4R at Boston Logan International Airport. The pilot contacted the airport control tower and reported over the outer marker. Shortly thereafter, the aircraft entered a left turn, after which radio and radar contact were lost. The aircraft crashed approximately 2.5 miles south-southeast of the airport.
During impact, the aircraft struck a residence and a parked automobile. Three houses and ten automobiles were destroyed by impact and subsequent fire. Other houses sustained fire damage.
The en route portion of the flight had been uneventful, except that the pilot used the call sign 'N251DE' instead of 'N33670', which was the registration number of his aircraft.
Witness Account
A witness near the crash site reported that he initially thought the aircraft was experiencing engine problems when he saw it descending in a westerly direction. He stated that the engine then 'smoothed out' and the plane began to climb, but it suddenly went into a dive and crashed.
Investigation Findings
Investigators found no preimpact part failure or malfunction of the aircraft. The pilot had a total flight time of 545 hours, including 59 hours of instrument time and 95 hours of night experience. The flight was conducted under Part 135 regulations.