Accident Overview
An airplane conducting an Instrument Landing System (ILS) approach to Runway 15 collided with static wires approximately 2 miles north of the runway threshold. The wires were located directly in the airplane's flight path and aligned with the ILS final approach course. The local control tower was closed at the time of the accident.
Flight Path and Weather Conditions
The accident occurred during an approach in deteriorating weather. The 2155 weather observation from Otis Air National Guard Base reported an indefinite ceiling of 100 feet, sky obscured, visibility 3/4 mile, light rain and fog, temperature 59°F, dew point 58°F, wind from 170° at 14 knots gusting to 19 knots, and an altimeter setting of 29.96 inches Hg.
Pilot Reports
Three other aircraft completed the approach prior to the accident airplane, N402BK. The pilots of those aircraft all reported that, while on the final approach course at approximately 500 to 700 feet MSL, they encountered downdrafts and turbulence. According to the pilots, these downdrafts caused their airplanes to fall below the glide slope. In order to regain the glide slope, they needed to increase power or adjust the aircraft's pitch attitude.
Conclusion
The investigation determined that the airplane struck static wires while on the ILS approach. No further details regarding the cause or contributing factors were provided in the source material.