 On 30 May 2016, investigators revealed that the LP turbine blades on the left (number one) Pratt & Whitney PW4098 engine had "shattered", with fragments piercing the engine cover, with fragments subsequently found on the runway.The engine's HP turbine blades and HP compressor were intact and free of abnormalities, and investigators found no evidence of a bird strike., the investigation into the cause of the accident was still ongoing.