Atlas Air 747 Diverts to O'Hare After False Fire Alarm

A Boeing 747 cargo jet operated by Atlas Air was forced to declare Mayday while approaching O'Hare International Airport in Chicago on Thursday, October 1, 2026. The aircraft had departed from Frankfurt, Germany about 10 hours prior and was carrying five souls on board.

The pilot reported a fire alarm indication in the aft cargo hold, prompting air traffic controllers to clear the plane for an emergency landing on Runway 9C/27C at O'Hare. All runways were closed while the aircraft landed, with Chicago Fire Department (CFD) rescue vehicles meeting it near the end of the runway.

After landing, the CFD's ARFF Rescue 6510 crew used a Forward-Looking Infrared (FLIR) thermal camera to check the back of the aircraft and reported no indications of an actual fire. The pilot explained that a crew member had checked the lower deck cargo area and found no signs of a fire.

The Emergency Standby alert was secured, and the Still and Box Alarm was struck out after it was determined that the alarm may have been faulty. The aircraft restarted its engines and taxied to the Southeast Cargo ramp with CFD support vehicles following.