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.
Planning A Seasonal Dip? Follow These Water Safety Tips
TD Says No 'Realistic' Rail Plan Evident Amid Failure To Address Growing Commuter Crises For Wicklow
Wicklow's Property Market Highest Outside Of Dublin
Soc Dems Wicklow TD Blasts €19B Electricity Network Upgrade Amid Rising Household Costs
Water Infrastructure Project Plans To Shore Up Wicklow Supply For Decades To Come