A propeller discovered on South Stradbroke Island is part of the wreckage of a vintage Yak 52 plane that went missing on Wednesday, police have confirmed. Authorities say the pilot of the aircraft was a 51-year-old Dutch national living on the Gold Coast, and his passenger was a 31-year-old mother. The pair took off on a scenic flight for the woman’s birthday, falling on Thursday. Police are still searching for their bodies.