La Paz です。
昨年12月の米国での墜落原因を調査した海兵隊調査委員会は事故原因は人為的な操作ミスではなくオスプリに欠陥があることを認めました。
事故原因はエンジンを動かしローターの速度や角度を調整する油圧システムとコンピュータープログラムの欠陥によるとのこと（らしいー内容が専
門的でわかりづらい）、
油圧システムと合わせ、フライトコントロームシステムの改善も勧告しています。
こんな欠陥機のために海上基地を作り、しかも基地建設に一番利権が絡んでいるといわれる橋本が再び総理になったら大変なことに
ペンタゴンのニュースもやはり転載不可でしょう。
WASHINGTON, April 9, 2001 -- A burst hydraulic line and
defective computer software caused a V-22 Osprey aircraft
to go out of control and crash in North Carolina during a
training flight last December, a Marine Corps' report says.
Marine Gen. Martin R. Berndt announced the findings of his
service's Judge Advocate General Manual Investigation into
the cause of the crash at an April 5 Pentagon press
briefing.
Four Marines were killed Dec. 11 when their Osprey tilt-
rotor aircraft crashed near Jacksonville, N.C. The twin-
engined Osprey has unique prop-rotors that can be moved to
point forward for level flight like a fixed-wing plane or
upward to provide helicopter-like maneuverability.
Reading from a prepared statement, Berndt, commanding
general of the 2nd Marine Expeditionary Force at Camp
Lejeune, N.C., said the causes of the crash were twofold
and weren't attributable to aircrew error.
"Aviation mishaps are seldom caused by a single factor,"
Berndt said. "This one was no exception."
He said a rupture occurred within one of the aircraft's
three hydraulic systems used to move its engines and adjust
the prop-rotors' pitch or angle. He said bundled wire
within the aircraft's left engine compartment had chafed or
rubbed against a titanium tube carrying hydraulic fluid.
The report noted that "based on the location of the
ruptured hydraulic line in the nacelle area, it would have
been extremely difficult to see any existing chafing on the
hydraulic line during a routine inspection."
"The wire bundle did not rub completely through the
tubing," Berndt said, but enough chafing occurred to cause
the tube to rupture under pressure. "This resulted in a
total loss of hydraulic fluid in the No. 1 system in a
matter of seconds. This hydraulic failure alone would not
normally have caused an aircraft mishap."
Berndt said the loss of hydraulic pressure caused a flight
control system warning light to go on, which was
accompanied by a warning tone.
"The published procedure for responding to such a failure
is to press the primary flight control system reset
button," he said.
When the pilot pushed the reset button, a software flaw
caused "rapid and significant changes to prop-rotor pitch,"
Berndt said, causing the aircraft to speed up and then slow
down. The pilot pressed the reset button several times, and
the aircraft became increasingly unstable with each press,
he said.
"The accelerating and decelerating of the aircraft every
time that button was pressed was what caused the aircraft
to stall and lose controlled flight," Berndt said.
Berndt said the Marine report recommends that Naval Air
Systems Command and Osprey contractors conduct complete
reviews of the aircraft's hydraulic line clearances, wire
bundle placement, and computerized flight control system.
The report also called for an investigation into the
possible redesign of the Osprey's hydraulic system.
Ospreys have been grounded since the December crash.
Findings are pending for DoD inspector general crash
investigation and a "soup to nuts" V-22 program study by a
blue-ribbon panel formed last December by then-Secretary of
Defense William Cohen
"We will fly the aircraft or not fly the aircraft depending
on the results," Berndt said.
油圧システムについて
http://www.defenselink.mil/news/Apr2001/010405-D-6570C-010.jpg
もっと詳しいインタビューは
http://www.defenselink.mil/news/Apr2001/t04052001_t405mv22.html