Singapore Airlines on Friday said one of its three A380 superjumbos that were found to have oil stains on their engines
has returned to service after an engine change advised by manufacturer Rolls-Royce.
A second A380 aircraft was expected to be returned to service by Saturday while the engine change on the third plane was ongoing, the airline said, adding that flight schedules remained unchanged.
Singapore Airlines said it was further inspecting the engines on its fleet if 11 Airbus A380s after Europe's aviation regulator identified an oil fire as the likely cause of an engine failure that forced a Qantas A380 into an emergency landing last week in Singapore.
In an emergency airworthiness directive issued Wednesday, the European Aviation Safety Agency ordered "repetitive inspections" for Rolls-Royce Trent 900 engines on all A380 aircraft.
Three airlines use those engines: Singapore Airlines, Australia's Qantas Airways and Germany's Lufthansa.
Qantas has grounded its fleet of six A380s while Lufthansa has ordered tests of the engines on the ground.