Qantas reached a settlement with Rolls Royce over compensation for flight disruptions caused by a mid-air engine explosion on a Qantas Airbus A380 aircraft in November 2010. According to an Australian Transport Safety Bureau investigation, the explosion was most likely caused by a defect in the engine, which was manufactured by Rolls Royce. The incident prompted Qantas to temporarily ground its fleet of A380 aircraft to carry out a comprehensive engine inspection. The amount of the settlement was reported to have been approximately US$90 – 100 million.