DALLAS- American Airlines (AA) subsidiary American Eagle flight AA5089, operated by PSA Airlines (OH), returned to St. Louis Lambert International Airport (STL) on October 17, 2026, after passengers reported an unusual odor and cabin haze.
The Bombardier CRJ900 was bound for Philadelphia International Airport (PHL) when oxygen masks dropped shortly after takeoff. The aircraft landed safely, but passengers were ordered to evacuate, with some reportedly jumping from the wing onto the runway.
Cabin Haze and Oxygen Masks Prompt Emergency Return
American Eagle flight AA5089 was scheduled to depart St. Louis at 6:00 a.m. local time on Saturday, October 17. However, an engine-start problem delayed the flight by more than two hours before the aircraft finally took off.
Passengers reported hearing a loud buzzing and grinding noise near the rear of the aircraft while it remained at the gate. According to passenger accounts, the pilot announced that one of the engines had a starting problem, preventing the aircraft from departing as scheduled.
The CRJ900 eventually took off at approximately 8:13 a.m. local time. About 15 minutes into the flight, passengers experienced a sudden change in the aircraft’s movement, followed by a loud bang and a drop in altitude. Oxygen masks then deployed from the overhead panels.
Passengers also described haze or smoke filling the cabin, prompting concerns about the aircraft’s condition. The pilots turned the aircraft around and requested an emergency landing at St. Louis Lambert International Airport.
According to reports, the pilot contacted the airport’s control tower at approximately 8:43 a.m. The aircraft landed safely at around 8:59 a.m., after flying east of St. Louis before returning to the airport.
Neither the airline nor the airport has publicly established the cause of the unusual odor or explained why the oxygen masks deployed. The reported symptoms alone do not confirm whether the aircraft experienced a loss of cabin pressure or another technical problem.
Passengers Evacuated Onto the Runway
After landing, flight attendants instructed passengers to evacuate the aircraft. Some passengers reportedly exited onto the wing and jumped to the ground, while other passengers helped them down.
Passengers described the experience as frightening, particularly after the oxygen masks dropped and the cabin filled with haze. Tessa and Mark Springer, who were travelling together, told local media that they feared the aircraft might crash. Tessa reportedly sent messages to family members during the emergency.
Another passenger, Olivia Clancy, described concerns about the aircraft’s thrust shortly after takeoff. She was travelling with her two young children and said the aircraft’s behaviour appeared unusual before the oxygen masks deployed.
Airport personnel subsequently assisted passengers away from the aircraft. Reports indicated that passengers waited near the runway before being directed towards an exit gate.
Local media reported no injuries from the incident. However, the exact number of passengers and crew members aboard flight AA5089 has not been publicly confirmed.
American Airlines Confirms Maintenance Inspection
American Airlines confirmed that American Eagle flight AA5089 returned to St. Louis shortly after departure because of what it described as “a reported odor.”
The airline said the aircraft landed safely and was removed from service for inspection by its maintenance team. American also apologised to affected passengers and thanked its employees for their professionalism.
The statement did not identify the source of the odor or explain the oxygen-mask deployment. It also did not clarify whether the earlier engine-start problem was related to the incident that occurred after takeoff.
American Airlines subsequently arranged alternative flights for affected passengers, with rebookings taking place later on Saturday.
Engine Problem Delayed Flight AA5089 Before Takeoff
The initial technical problem added to passengers’ concerns about the incident. Flight AA5089 was scheduled to leave St. Louis at 6:00 a.m., but the reported engine-start issue pushed its departure back by more than two hours.
Passengers described loud buzzing and grinding noises while the aircraft was still on the ground. The reported difficulty starting an engine was followed by the cabin incident after takeoff, although no official findings have established a connection between the two events.
The aircraft’s return and subsequent removal from service allowed maintenance personnel to inspect it before further operations. American Airlines has not publicly provided a detailed technical explanation of the incident.
Aircraft Details: American Eagle Flight AA5089
| Detail | Information |
|---|---|
| Incident date | October 17, 2026 |
| Flight number | AA5089 |
| Airline brand | American Eagle |
| Operating airline | PSA Airlines (OH) |
| Parent airline | American Airlines (AA) |
| Aircraft type | Bombardier CRJ900 |
| Aircraft registration | N574NN |
| Departure airport | St. Louis Lambert International Airport (STL) |
| Scheduled destination | Philadelphia International Airport (PHL) |
| Scheduled departure | 6:00 a.m. local time |
| Actual takeoff | Approximately 8:13 a.m. local time |
| Return landing | Approximately 8:59 a.m. local time |
| Reported problem | Unusual odor, cabin haze and oxygen-mask deployment |
| Outcome | Safe landing followed by passenger evacuation and maintenance inspection |
Aircraft tracking information identifies N574NN as a CRJ900 operated by PSA Airlines under the American Eagle brand. Records identify the aircraft as a 2015-built regional jet. The CRJ900 can accommodate up to 76 passengers in a two-class configuration, although the number of people aboard this particular flight has not been confirmed.
Passengers Question Airline’s Response After Evacuation
Beyond the emergency itself, passengers raised concerns about the assistance they received after leaving the aircraft.
Clancy said her family was offered $12 per person in food vouchers, which she considered inadequate given the circumstances. She also questioned the guidance provided by airline and airport personnel after the evacuation.
American Airlines said affected passengers were rebooked onto later flights that Saturday. However, the airline has not publicly answered all the questions surrounding the cabin incident, including the cause of the odor, the deployment of the oxygen masks, and whether the initial engine-start problem played any role.
The incident highlights the challenges airlines face when a technical issue develops into an emergency shortly after takeoff. Although the pilots returned the aircraft safely to St. Louis, the precise cause of the event remains publicly unexplained.
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