Cpt. Smollett wrote:
Уверены? Вроде только первая катастрофа связана с электроникой (та что на видео), но mis-wired - это не ошибка в софте, а flight control system - это не FADEC. инфу я взял из википедии, не знаю насколько она достоверна.
V-22 program officials are developing new software for full-authority digital electronic controllers (FADECs) on the tilt-rotor's engines to prevent their failure from resulting in an uncommanded takeoff.
U.S. Marine Corps officials suspect a FADEC failure as the cause of a March 27 mishap at MCAS New River, N.C., in which an Osprey inadvertently lifted off, then fell back to the ground. The fall snapped the aircraft's right wing. No one was injured. Marine Corps are assessing whether the aircraft can be salvaged.
Marine Corps Col. Bill Taylor, manager of the V-22 Joint Program Office, said the mishap occurred as two pilots were preparing to do a functional flight check after unscheduled maintenance that required removal of the No. 2 engine and disconnection of its "A" FADEC. Taylor said V-22 procedures require pilots to switch between the "A" and "B" FADEC on each engine, with the engines running, to verify that both are good.
When the pilots switched FADECs, the No. 2 engine spooled up and the aircraft lifted off to a height that Taylor described as 6-7 ft. He discounted witness reports that the aircraft rose 30 ft., indicating the aircraft's recorders showed no such climb. The power-up occurred with the thurst control levers in the idle position.
It took about 2.4 sec. for the "B" FADEC to recognize the uncommanded power-up, take control and spool down the No. 2. At that point, the aircraft stopped flying and fell to the ground. Taylor said the wing broke as it was designed to. This is a safety measure, he said, intended to shed downward loads and prevent the wing-stow assembly atop the aircraft from crashing into the cabin.
Taylor said the FADEC software was written on the assumption that the most critical situation in which a failure would occur would be in flight. Therefore, the engine defaults to a power-up condition to maintain altitude. It was not anticipated that a failure on the ground would cause the aircraft to fly before the pilots knew it.
In addition to the FADEC software change, which Taylor expected would be in place by October, the Marines are revising V-22 procedures to instruct pilots to set the thrust control levers to the position corresponding to the expected engine power. They also are instructing pilots, should the aircraft lift off, to be prepared to remain airborne until they regain full control.
A mishap investigation board is expected to issue its findings shortly.
MILITARY
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Think without learning is dangerous.
