They also are seeking information about the plane's altitude and speed.
It's hard to believe that the FAA itself is unable to determine those figures from radar data. I wonder how the coverage is in that area?
Willett said witnesses should use the "M" on Mount Sentinel at 800 feet and the roof of Aber Hall at 100 feet as reference points.
Not to say one way or the other if the guy was in violation, because I have no way of knowing, but....
I'd cetrtainly not put a whole lot of faith in the judgement of untrained observers as to what altitude and speed an aircraft was travelling. To people who are only accustomed to seeing light planes droning along at 120 knots 3000 feet overhead, a Mustang at 1200 and 240 would seem awfully low and fast.
As a member of the Civil Air Patrol, I was taught that potential eyewitnesses are very vulnerable to the "power of suggestion". If you were searching for, and to ask people if they saw, "a blue, high-wing single engine aircraft, heading east at about 10 a.m., with the engine making funny noises", you'd get a lot of "yes" answers, even from people who could never have possibly seen the object of your search. On the other hand, if you simply explained that you were looking for a missing aircraft, and asked if they'd seen anything out of the ordinary, and they described "a blue, high-wing single engine aircraft, heading east at about 10 a.m., with the engine making funny noises",
that would carry a lot of weight. The news story provides all the details necessary to describe a flight that was in violation, even if you were asleep in your basement at the time.
Besides that, I'm on record as always being skeptical about the news media's ability to get the details correct...