Ambulances and fire appliances have been sent to the George Best Belfast City Airport after a plane developed a "technical fault" while in-flight.
The Flybe plane was travelling from East Midlands Airport, with 41 passengers and five crew on board, on Tuesday evening.
The plane landed safely just before 19:00 BST and none of the passengers or crew were hurt.
An airport spokesman said it was a merely a precautionary measure.
The Sydenham bypass, which runs alongside the airport, was closed for a time but when the plane landed safely the road was re-opened.
It is normal procedure for planes with technical faults to report them to the airport immediately and to have the emergency services on stand-by.