Singapore Airlines has grounded its fleet of 11 A380s following last week’s Rolls-Royce Trent 900 engine incident on Qantas. Then, after initial checks, Singapore returned all the aircraft to service. However, now, based on further tests, Singapore has removed three A380s from service again. The three all have oil stains that are giving the carrier pause.
According to John Page, an aircraft designer and senior lecturer in aerospace engineering at the University of New South Wales in Sydney, the most likely cause of an oil leak or stain would be a small crack in the oil supply pipe that lubricates the engine's bearings. Such a leak can, in certain circumstances, lead to a fire. However, Page added that trace amounts of oil are not necessarily considered a serious issue.
Until further analysis can be performed, the three Singaporean A380s will remain grounded.