SYDNEY — The investigation of the engine failure that grounded Qantas’ fleet of superjumbo jets is making progress, manufacturer Rolls-Royce said Monday, while the airline announced that tests uncovered worrisome oil leaks in the engines of three more Airbus 380s.
Australia’s national carrier said its fleet of six double-decker planes would stay grounded for another 72 hours.
Airbus and other airlines said they would take no action until the investigation is completed and that it was premature to contemplate any change from the Rolls-Royce Trent 900 engines mounted on many of the A380s — the world’s largest passenger jet.
Meanwhile, a European aviation official said the engine’s design features had prevented a worse tragedy from occurring after it blew up.
An engine on a Qantas Airbus 380 exploded minutes into a flight from Singapore to Sydney on Thursday, scattering debris over Indonesia’s Batam island.
The plane, carrying 466 people, returned to Singapore and made a safe emergency landing.
