the school, were killed. The helicopter had been dispatched to investigate a problem with the landing gear of Heinz's plane. While moving in for a closer look, the helicopter collided with the plane, causing both aircraft to lose control and crash. The subsequent NTSB investigation attributed the cause of the crash to poor judgment by the pilots of the two aircraft involved. On December 22, 2015, at 8:45 a.m., a Porter Airlines flight with 66 on board was diverted to Williamsport Regional Airport due to reports of thick smoke in the cockpit and cabin. The flight from Billy Bishop Toronto City Airport to Washington Dulles International Airport had to make an emergency landing in Williamsport. Two crew members were taken to Williamsport Regional Medical Center to be checked out due to smoke inhalation. The sixty-six passengers were taken to the terminal to be cleared by customs and then were able to leave airport grounds. The next day Porter Airlines brought a new Dash 8 400 to continue the passengers to Washington, D.C. See also William T. Piper Memorial Airport List of airports in Pennsylvania Allegheny Airlines Flight 371 References External links Williamsport Regional Airport, official web site Williamsport Regional Airport at Pennsylvania DOT Bureau of Aviation Williamsport Regional Association of Pilots Aerial image as of April 1993 from USGS The National Map Airports in Pennsylvania West Branch Susquehanna Valley Transportation buildings and structures in Lycoming County, Pennsylvania Former Essential Air Service airports