Montréal–Dorval International Airport no relation Cincinnati/Northern Kentucky International Airport
Air Canada Flight 797 was an international passenger flight operating from Dallas/Fort Worth International Airport to Montréal–Dorval International Airport, with an intermediate stop at Toronto Pearson International Airport. On 2 June 1983, the McDonnell Douglas DC-9-32 operating the service developed an in-flight fire in air around the rear lavatory that spread between the outer skin and the inner decor panels, filling the plane with toxic smoke. The spreading fire also burned through crucial electrical cables that disabled most of the instrumentation in the cockpit, forcing the plane to divert to Cincinnati/Northern Kentucky International Airport. Ninety seconds after the plane landed and the doors were opened, the heat of the fire and fresh oxygen from the open exit doors created flashover conditions, and the plane's interior immediately became engulfed in flames, killing 23 passengers who were unable to evacuate the aircraft.The accident became a watershed for global aviation regulations, which were changed in the aftermath of the accident to make aircraft safer. New requirements to install smoke detectors in lavatories, strip lights marking paths to exit doors, and increased firefighting training and equipment for crew became standard across the industry, while regulations regarding evacuation were also updated. Since the accident, it has become mandatory for aircraft manufacturers to prove their aircraft could be evacuated within 90 seconds of the commencement of an evacuation, and passengers seated in overwing exits are now instructed to assist in an emergency situation.Descent
At 19:08, Captain Cameron began an emergency descent and declared "mayday, mayday, mayday" to Indianapolis ATC. Controllers granted Flight 797 clearance to descend for an emergency landing at Cincinnati/Northern Kentucky International Airport in Boone County, Kentucky, near Cincinnati, Ohio.: 4  Because the loss of electrical power had impaired some flight instruments, controllers had to direct Flight 797 to the airport using a "no gyro" approach, with the controller observing Flight 797 on radar and directing the flight to make turns based on radar position and heading.: 5 Smoke filled the passenger cabin and entered the cockpit as the plane descended.: 7  The PA system also failed, leaving the flight attendants unable to communicate efficiently with the passengers. Nevertheless, attendants were able to move all passengers forward of row 13, and to instruct passengers sitting in exit rows on how to open the doors,: 8  a practice that was not standard on commercial airline flights at the time.
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