Summary of A Crash Site That Became The Most MYSTERIOUS Disaster In HISTORY | Mayday: Air Disaster

00:00:00 - 00:45:00

The video discusses the unsolved case of United Airlines Flight 585, which crashed into a Colorado Springs neighborhood in 1999, and how similarities between the two crashes suggest that a malfunctioning tailplane may have been to blame. The captain of United Airlines Flight 427, which crashed into a Pennsylvania field in 1973, discusses the similarities between the two accidents and how investigators are trying to piece together what may have caused them.

• 00:00:00 United Airlines flight 585, which was heading to Colorado Springs, experienced heavy turbulence and lost air speed before crashing into a remote area, killing all 52 passengers and crew. The cause of the crash remains a mystery.
• 00:05:00 Investigators from the National Transportation Safety Board ( NTSB) arrive at the crash site of United Airlines flight 585, which fell out of the sky at 370 kilometers per hour, killing all 20 passengers and five crew members. The investigation into the crash will take longer than expected, as pilot error is a factor in 70 percent of air disasters. The crew of United 585 was praised by their captain for their excellent interaction.
• 00:10:00 United Airlines Flight 585 experienced a mechanical failure, possibly due to a dent on the faceplate of the power control unit caused by the jarred indicator needle. Investigators are still unsure if the engines were running at the time of the crash, but it is clear that the plane was intact and in control prior to the crash.
• 00:15:00 The ntsb releases a report on the crash of flight 585 that does not determine the cause of the accident. A year later, a similar accident occurs on US Airways flight 427, and the NTSB is once again unable to determine the cause. The captain of US Airways flight 427 and first officer of flight 585 share similarities in their experiences and theories of the accidents, and it is suspected that wind rotors were a factor in both accidents.
• 00:20:00 The video discusses the unsolved case of United Airlines Flight 585, which crashed into a Colorado Springs neighborhood in 1999, and how similarities between the two crashes suggest that a malfunctioning tailplane may have been to blame. The captain of United Airlines Flight 427, which crashed into a Pennsylvania field in 1973, discusses the similarities between the two accidents and how investigators are trying to piece together what may have caused them.
• 00:25:00 After the sudden and unexplained crashes of two Boeing 737s, the NTSB is trying to find out what caused them. The investigation into the crash of flight 427 may be the most important in the history of the organization, but it won't be easy as answers are still years away. In just three years, two Boeing 737s have crashed in the United States with no survivors. Both planes were moments from landing and in both cases the planes were under full power but the pilots were unable to control their jets. The crash of United Flight 585 investigators were unable to find a cause, but they're now searching for clues into the second crash, United Air Flight 427. Investigators believe that if a collision with birds brought 427 down, it would be the first time that has ever happened. However, they can't find any other evidence that would support this theory. The investigation into the crashes of the 737s is still ongoing, but so far, there is no clear explanation for what caused them.
• 00:30:00 The video discusses the 1996 crash of a 737-200, which is thought to be caused by a sudden roll to the right. The crew's initial attempts to correct the situation failed, leading to the crash. The investigation into the crash stalled for years due to a lack of evidence, until a similar crash involving two 737s in 2013 led investigators to revisit the case.
• 00:35:00 Eastwind Airlines flight 517 experienced a sudden, uncontrolled rollover after two prior incidents in which the airplane's rudder controls were implicated. Investigators were able to determine that, in each case, the rudder pedals were not working correctly, suggesting that a problem with the power control unit was to blame.
• 00:40:00 In 1996, investigators examining the crash of United Airlines Flight 585 discovered that the servo valve that moved the rudder could jam, leading to a deadly spiral. In October of that year, investigators examining the crash of United Airlines Flight 427 discovered that the same valve could also reverse, causing a fatal accident.
• 00:45:00 The Ntsb investigated two mysterious crashes of flights in 10 years, concluding that rudder reversal caused both incidents. The safety board made sweeping changes to improve the safety of the 737.