Another Plane incident
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https://www.cbc.ca/news/canada/toronto/preliminary-report-released-delta-air-lines-crash-1.7488494
A warning system on the Delta Air Lines flight that crashed at Pearson airport last month sent an alert indicating a high rate of descent less than three seconds before the plane touched down, according to a preliminary report.
Less than a second before touchdown, the plane's rate of descent was 1,110 feet per minute. The flight manual defines a hard landing as a "landing at a vertical descent rate greater than 600 ft/min when the aircraft's gross weight is less than or equal to [maximum landing weight]," the report says.
The Delta Air Lines flight weighed less than its maximum allowable take-off weight at the time of the crash.
The report also says that less than a second before landing, the angle of the plane's aircraft, known as the pitch attitude, was one degree. The flight operations manual states pitch attitude at touchdown should be between three and eight degrees, the report said.
and
"At touchdown, the following occurred: the side-stay that is attached to the right [main landing gear] fractured, the landing gear folded into the retracted position, the wing root fractured between the fuselage and the landing gear, and the wing detached from the fuselage, releasing a cloud of jet fuel, which caught fire," the report said.
"The exact sequence of these events is still to be determined by further examination of the fracture surfaces."
The plane then began to slide along the runway, eventually going off the right side into a snow-covered grass area and coming to rest on Runway 15L, near the intersection with Runway 23
