It's found in the US Constitution, First Amendment. Besides which, I know a few of the Osprey pilots. They love the aircraft! They weren't FORCED to fly anything. Neither were those that flew them into the ground.
I am also a pilot of light aircraft. I've tried to control a rotor wing aircraft and decided that I prefer fixed wings. It is a different animal, indeed!
June 1991..."The pilot, Grady Wilson, suspected that he may have accidentally set the throttle lever the opposite direction to that intended, exacerbating the crash if not causing it.
April 2000... The cause was determined to be vortex ring state (VRS), a fundamental limitation on vertical descent which is common to helicopters. At the time of the mishap, the V-22's flight operations rules restricted the Osprey to a descent rate of 800 feet per minute (4.1 m/s) at airspeeds below 40 knots (74 km/h) (restrictions typical of helicopters); the crew of the V-22 in question exceeded this operating restriction with a rate more than 100% greater.
April 2010 ... The investigation found several factors that significantly contributed to the crash; these include low visibility, a poorly executed approach, loss of situational awareness, and a high descent rate.
April 2012 ... U.S. investigators found no mechanical flaw with the aircraft, and human error was determined to be the cause.
