A flight departing from Edinburgh Airport declared an emergency shortly after takeoff, causing major disruption.
British Airways flight BA1443 to London Heathrow sent a 7700 call after departure.
The flight deck reported to the control tower than the landing gear was stuck down, and after around 35 minutes in a holding pattern the jet was able to land safely back at Edinburgh Airport.
However, with the plane remaining on the runway other flights had to be diverted.
A flight from London Gatwick and one from Amsterdam were both sent to Glasgow Airport, and a Dubai flight was also diverted.
Later NOZ1640 from Oslo was also diverted to Glasgow, before Edinburgh Airport announced it had been forced to suspend all flights due to the only runway being blocked.
It said in a statement: "Operations are currently suspended while teams respond to an aircraft issue. The aircraft landed safely and remains on the runway.
"Passengers are being taken back to the terminal via coaches and teams are carrying out inspections before operations resume."
Flights resumed just before 2pm.
Eyewitnesses said passengers had to be deplaned on the runway before the jet could be towed away.
When a plane is 'Squawking 7700' it means that the crew have identified a concern about the safety of the flight and require either timely or immediate assistance.
According to pilot Captain Ken Hoke: "'Emergency' doesn’t necessarily mean passengers and crew are in a life and death struggle worthy of the evening news. Most of the time, the crew is using an abundance of caution and letting ATC know that they are working with an abnormal situation."
British Airways said: "The aircraft returned to Edinburgh Airport safely after our pilots identified a technical issue after take-off. We've apologised to our customers for the disruption to their journey and our teams are working hard to get them on their way as soon as possible."
