A Loganair flight from Sumburgh to Edinburgh was forced to divert after one of its engines was shut down.
The captain of the Saab 340 aircraft took the precautionary step after an air pressure indicator warning light came on in the cockpit.
Flight BE6992 had left Sumburgh at 7.40am for Edinburgh Airport with 28 passengers and three crew.
But it diverted to Aberdeen Airport at 8.40am, where it was met by emergency services in accordance with standard procedure.
Loganair say arrangements have been made to take the passengers on to their original destination.