The aircrafts propeller and right-wing tip contacted the ground when it was blown onto its side while taxiing behind a larger aircraft. The pilot said he was vacating the runway via taxiway A3 at Cairns, when the incident happened. He said it was necessary to hold aileron into wind while taxiing, as the crosswind was gusting at right angles at about 20 kts. After entering taxiway A3 the aircraft passed behind a larger multi engined aircraft which had several engines running. The pilot was not aware that engineering personnel were conducting high power engine checks on the larger aircraft at the time. The pilot said he believed the accident was caused by a combination of a "crosswind component and prop wash" from the large aircraft.