Date: 09-JAN-2020
Time: 20:33 LT
Type: Silhouette image of generic R66 model; specific model in this crash may look slightly different Robinson R66
Owner/operator: Redmark Capital LLC
Registration: N450MC
C/n / msn: 0916
Fatalities: Fatalities: 2 / Occupants: 2
Other fatalities: 0
Aircraft damage: Written off (damaged beyond repair)
Location: Silver Spring Township, Cumberland County, near Harrisburg, PA
Phase: En route
Nature: Private
Departure airport: Baltimore-Glenn L. Martin Airport, MD (MTN/KMTN)
Destination airport: Harrisburg Skyport, PA (HAR/KCXY)
Narrative: On January 9, 2020, about 2029 eastern standard time, a Robinson R66, N450MC, experienced an in-flight break-up near Mechanicsburg, Pennsylvania. The private pilot and one passenger were fatally injured and the helicopter was destroyed. The helicopter was operated under the provisions of title 14 Code of Federal Regulations Part 91 personal flight. Night visual meteorological conditions prevailed at the time and no flight plan was filed for the flight. The flight originated about 1958 from Martin State Airport (MTN), Baltimore, Maryland, and was destined for Buffalo Niagara International Airport (BUF), Buffalo, New York. According to preliminary air traffic control radar information provided by the Federal Aviation Administration, after takeoff the helicopter climbed to about 2,300 ft mean sea level (msl) and proceeded on a north-northwesterly track. The flight remained about that altitude and track between about 2002 and 2023, when the flight turned left toward the northwest, but remained at about the same altitude until 2028:53. About that time the helicopter began a descent, which continued until the last radar target at 2029:17, at an altitude of about 1,150 ft msl. One witness who was outside about 1,000 ft east of the accident site reported hearing and seeing a low flying helicopter, which was "struggling to fly." She reported hearing a high-pitched noise as if the rotor was having difficulty turning. Suddenly she heard a loud "boom" with a flash of light. At that point the helicopter disappeared from her view. Another witness who was inside his residence about 800 ft northeast of the accident site reported hearing a "thumping" sound which slowed. He then heard a loud bang which shook his house. He immediately went to his back door, then about 30 seconds later he received a text message from his neighbor alerting him of the helicopter accident. He also reported hearing a "percussion" sound before the sound of impact. The helicopter was equipped with a Rolls-Royce Engine Monitoring Unit that was retained for downloading. Outlying wreckage consisting of a section of main rotor blade, tail rotor assembly, tailboom, main rotor mast, and other pieces of the helicopter were recovered and retained for further examination.