Middle Flight Flight 527 is a regularly scheduled flight from Chicago, Illinois to Detroit, Michigan, with stops in Lafayette, Indiana, Cincinnati, Ohio, Columbus, Ohio, and Toledo, Ohio. Operated by one of the Convair 580 companies, on March 5, 1967, the flight crashed near Marseilles, Ohio, with the loss of 38 passengers and crew.
Video Lake Central Flight 527
Synopsis
On March 5, 1967, Lake Central Flight 527 was scheduled from Chicago, Illinois to Detroit, Michigan. The flight, operated by one of the Convair 580 aircraft companies, left Chicago at 1704H and runs normally to Lafayette, Cincinnati, and Columbus. No issues reported.
The plane was repaired in Columbus, and departed in 1952 hours for Toledo. In 2005, the flight was cleared by air traffic control to drop from 10,000 feet to 6,000 feet as it approached Toledo. Air traffic controls have requested that flights report a decline, and report crossing 8,000 and 7,000 feet. The crew claimed to leave 10,000 feet. This is the last transmission of the plane.
Witnesses around Marseilles, Ohio reported hearing sounds from aircraft between the hours of 2005 and the hour of 2010. Some people reported sounds like a "revving up" engine. Shortly thereafter, an explosive sound was reported.
By 2100 H authorities have confirmed that an aircraft crashed in the area. Rain mixed with snow was reported at the time of the accident.
Maps Lake Central Flight 527
Cause
The plane was found to be loaded within normal limits, and its crew was found to be eligible for flight, with no shortage reported.
The aircraft is equipped with flight data recorder. It can be read, because it did not suffer damage in the accident. About 14 minutes after departing from Columbus, the plane was on a 322 degree incline, when the plane suddenly turned right 40 degrees, and then left 55 degrees, where the power point to the recorder suddenly ended. The cockpit voice recorder loses power at the same time, though just before the power is lost the voice described by the investigator as "the first few seconds of the siren airstrike" sounds.
The plane crashed in a farm, with a 360-degree direction. The front of the plane had been separated from the main part of the plane, and the debris was found from a trail of 1.5 miles long, 1/2 mile wide at a 135-degree heading of the main wreck. The right propeller is completely detached from the engine, just like the propeller. In reconstructing the debris, the researchers revealed that the exact propellers had been separated in flight and cut off the fuselage.
During manufacture, the propeller piston, which controls the propeller pitch, is coated through a process called nitriding , which solidifies them and makes them more resistant to surface wear. They should be checked to make sure the process is complete. Although it is not known why the propellers on the N73130 are not checked nitrided or fail, the fact remains that it is, and installed on the N73130. During the lifetime of the machine, the piston slowly disappears. During the flight, the piston finally fails, causing the propeller to go too fast. The propeller then fails due to overstress, 1 to 2 seconds later. When the blades fail, the propellers are thrown through the cab, disconnecting the control cables as well as the structural integrity of the aircraft itself. The investigators determined that the accident was solely due to defects in the propeller and subsequent failure.
References
External links
- Detailed explanation of blade failure
- Photo N73130
Source of the article : Wikipedia
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