What happened
While executing an ILS Runway 15 approach, the N402BK struck static wires located approximately two miles north of the runway. The wires were positioned directly within the aircraft's flight path and aligned with the ILS final approach course.
At the time of the accident, the local control tower was closed. Prior to the arrival of N402BK, three other aircraft had completed the same approach. The pilots of those preceding aircraft reported encountering downdrafts and turbulence at altitudes between 500 and 700 feet MSL. These pilots noted that the downdrafts forced their aircraft below the glide slope, requiring them to adjust pitch attitude or increase power to rejoin the correct descent path.
Weather observations from Otis Air National Guard Base recorded an indefinite ceiling of 100 feet with obscured skies, visibility of 3/4 miles, light rain, and fog. The temperature was 59 degrees Fahrenheit, with a dew point of 58 degrees Fahrenheit. Winds were reported at 170 degrees at 14 knots, gusting to 19 knots, with an altimeter setting of 29.96 inches HG.