Accidents
On March 3, 1991, United Airlines Flight 585, a 737-200, crashed in Colorado Springs, CO, killing 25 people.
On September 8, 1994, USAir Flight 427, a 737-300, crashed near Pittsburgh, PA, killing 132 people.
During the course of the investigation of Flight 427, the National Transportation Safety Board (NTSB) discovered that the PCU's dual servo valve could jam as well and deflect the rudder in the opposite direction of the pilots' input, due to thermal shock, caused when cold PCUs are injected with hot hydraulic fluid. As a result of this find, the Federal Aviation Administration (FAA) ordered that the servo valves be replaced and that new training protocol for pilots to handle unexpected movement of flight controls be developed.
Read more about this topic: Boeing 737 Rudder Issues
Famous quotes containing the word accidents:
“I can forgive even that wrong of wrongs,
Those undreamt accidents that have made me
Seeing that Fame has perished this long while,
Being but a part of ancient ceremony
Notorious, till all my priceless things
Are but a post the passing dogs defile.”
—William Butler Yeats (1865–1939)
“We are the men of intrinsic value, who can strike our fortunes out of ourselves, whose worth is independent of accidents in life, or revolutions in government: we have heads to get money, and hearts to spend it.”
—George Farquhar (1678–1707)
“Depression moods lead, almost invariably, to accidents. But, when they occur, our mood changes again, since the accident shows we can draw the world in our wake, and that we still retain some degree of power even when our spirits are low. A series of accidents creates a positively light-hearted state, out of consideration for this strange power.”
—Jean Baudrillard (b. 1929)