My sister and her husband were travelling to Bali from Darwin last night and 25 minutes into the flight there was a huge bang and a flash of orange. The plane was shuddering, everyone was really scared. The plane flew extremely slowly back to Darwin and there were fire engines, police and ambulences on the tarmac. She received a letter from Qantas this morning stating that there was mechanical engine failure and she was now due to leave tonight at 10pm.