A married couple who were expecting a baby have died in a light aircraft accident in north Queensland.
The wreckage of an aircraft carrying stockman Rhiley Kuhrt and his pregnant wife Maree was spotted by a rescue helicopter crew on Monday morning, after it was reported missing on Sunday.
The crash site is in rugged terrain in the Mount Hector range, south of Proserpine.
The Piper Cherokee was reported missing after failing to arrive at Lakeside Airpark, Proserpine by 6.30pm Sunday evening.
Inspector Andrew Godbold says preliminary investigations suggest visibility was poor when the plane crashed.
"A lot of showers, thunder and probably visibility down to nothing," he told reporters in Mackay.
Insp Godbold indicated the retrieval mission will take two-to-three days with local State Emergency Service crews assisting.
"It's a very rugged terrain there. There's obviously a lot of mountainous terrain in the area there and it is very difficult for us even just to walk in at this stage," he said.
The bodies are yet to be formally identified and the couple's family asked for privacy.