All flights into and out of Shannon Airport have been temporarily suspended.
It comes after a plan carrying US military rejected takeoff on the runway.
The airport said the incident involved a Boeing 767-300 and smoke was seen coming from its landing gear.
Emergency services are at the scene and all passengers and crew have disembarked from the plane.
Omni Air International - an airline that transports personnel for the US military - tweeted to say they're investigating.
Air traffic control confirmed that the rear wheels of the plane are to be replaced on the runway:
Shannon Airport is advising passengers to continue with check-in, but says American Airlines passengers won't be checked in until further notice.
Magic Wicklow Half Dozen Win Tailteann Team Of The Year Places After Summer Glory
Blessington Woman Running Dublin Marathon For Kidney Charity
Wicklow Crèche Worker Awaits Sentenced For Child Cruelty
Bray Barrister Called to the Inner Bar
Garda Patrols To Increase in Greystones and Delgany Ahead of Hallowe'en