An American Eagle flight bound for Philadelphia returned to St. Louis Lambert International Airport on October 17 after passengers reported a strange odor, haze in the cabin, and sudden alarming movements shortly after takeoff. American Eagle Flight 5089, a Bombardier CRJ900 operated by PSA Airlines, spent approximately 34 minutes in the air before landing safely without any reported injuries.
The flight, which was carrying travelers to Philadelphia, had already faced a delay of about two hours before departure due to an initial mechanical issue involving an engine-starting problem. Passengers Tessa and Mark Springer of Waterloo, Illinois, told local outlet First Alert 4 that they heard a loud buzzing or grinding noise from the back of the aircraft prior to leaving the gate.
Oxygen Masks Deploy and Cabin Haze Reported
After finally taking off at approximately 8:13 a.m. Central time, the regional jet climbed to roughly 21,000 feet over Illinois. About 15 minutes into the journey, passengers noticed an unusual smell and haze inside the cabin. A sudden jolt occurred, followed closely by the deployment of overhead oxygen masks.
Air traffic control recordings reported by Philadelphia station 6abc indicated that the flight crew alerted controllers about c**kpit fumes. The pilot requested an emergency landing at 8:43 a.m., and the aircraft safely touched back down in St. Louis at approximately 8:59 a.m.
“All of a sudden, the plane just felt like it hit a… like in a car, when you slam on your brakes… I was like, We’re going to die,” passenger Mark Springer told reporters, recounting the sudden midair motion.
Emergency Evacuation and Maintenance Investigation
Following the emergency landing, passengers evacuated the aircraft. Some travelers reported exiting via the overwing emergency exits and jumping to the ground, where fellow passengers assisted one another. Airport workers inspected the jet and moved it toward a gate while emergency responders waited.
American Airlines confirmed that Flight 5089 returned to St. Louis due to a reported odor onboard. The aircraft, registration N574NN, was immediately removed from service for a thorough inspection by the airline’s maintenance team. Affected passengers were rebooked on alternative flights later that day to complete their journeys.
Unanswered Questions Regarding the Incident
While aviation experts note that engine oil entering an air supply system can sometimes cause smoke, unusual odors, and vibrations, American Airlines has not publicly confirmed the exact technical cause of the incident. Investigators have yet to determine whether the pre-departure engine-start difficulties were connected to the subsequent cabin odor and oxygen mask deployment.
The Federal Aviation Administration mandates automatic passenger oxygen mask deployment before cabin altitude passes 15,000 feet on high-altitude aircraft, though the exact trigger for Friday’s deployment remains under review as maintenance crews analyze the regional jet.
