The Transportation Safety Board of Canada, which issued the report, continues to investigate the Feb. 17 crash-landing in which 21 people were hospitalized.
All 76 passengers and four crew members survived when the Delta plane arriving from Minneapolis burst into flames after flipping over and skidding on the tarmac.
The TSB of Canada report says that when the plane’s ground proximity warning system sounded 2.6 seconds before touchdown, the airspeed was 136 knots, or approximately 250 kph (155 mph). It says the plane’s landing gear folded into the retracted position during touchdown and the wing detached from the fuselage, releasing a cloud of jet fuel, which caught fire.
The safety board says its ongoing investigation is focusing on several key areas, including metallurgical examination of the wing structure, landing techniques, pilot training and the passenger evacuation process.
Meanwhile, ABC News reports the first officer, who was in her fifth straight day of flying, was at the controls of the plane, according to the report. She had 1,422 hours of flying total, which is below the Federal Aviation Administration minimum to be a commercial pilot.
She was able to fly commercially with a special exception from the FAA because she had a specific aviation degree and received a waiver, the report said.