Air Canada Flight 797, a McDonnell Douglas DC-9, was traveling from Dallas/Fort Worth to Montreal when it reported smoke in the cockpit shortly after takeoff. The crew attempted to manage the situation and declared an emergency, diverting to Cincinnati/Northern Kentucky International Airport for an emergency landing. Upon arrival, the aircraft had descended without incident and on landing it came to a stop. However, the situation worsened dramatically when the aircraft's doors were opened. As oxygen met the smoke-laden air, a flashover occurred, igniting a fire that spread rapidly throughout the cabin. First responders and emergency personnel struggled to control the fire, resulting in the tragic loss of twenty-three passengers onboard. The investigation into the incident revealed that inadequate safety protocols and materials used in the aircraft's interior contributed to the speed at which the fire spread. This led to intense scrutiny of existing safety measures regarding in-flight fires, particularly the materials permissible within commercial aircraft and procedures for smoke detection and evacuation. The event ultimately influenced regulatory bodies, including the Federal Aviation Administration (FAA) and Transport Canada, to enact new safety regulations aimed at preventing similar tragedies from occurring in the future.