A full-scale search has resumed for a vintage aircraft that went missing in Australia with six people on board.
The 1930s biplane vanished in Queensland as passengers were enjoying a scenic flight during an air show.
Pilot Des Porter, 68, was due to land his aircraft at Caboolture Airport, north of Brisbane, at about 2.15pm local time on Monday but never arrived.
It has been revealed that Mr Porter survived a fatal crash in the same aircraft which claimed the lives of his father and brother in the 1950s.
He was 10 when the plane flown by his father went down in a creek in south Brisbane in 1954.
In the latest incident, the de Havilland DH84 sent out a distress call alerting the emergency services who immediately began searching.
Beforehand, Mr Porter had said he was having difficulty positioning himself and wanted assistance.
A spokeswoman for the Australian Maritime Safety Authority said search conditions were "not ideal", with low and thick cloud blanketing the area.
It is understood conditions improved as the search resumed, with both helicopters, fixed wing aircraft and potentially people on foot taking part.
The organiser of the Monto Fly-In air show, Myles Breitkreutz, said Mr Porter was a highly experienced pilot.
The aviator said he had invited Mr Porter to the air show and felt terrible but was not giving up hope that his friend was safe.
He said: "I know the capabilities of Des as a pilot and we've got our thoughts and hopes that he's made an emergency landing in a paddock and waiting for weather to clear and everything's cool."
Helping the Royal Flying Doctor Service and other people was Mr Porter's "passion and his life", Mr Breitkreutz said.
The six missing had been part of large number of aviation enthusiasts who descended on the small town of Monto for the weekend air show.
Simone Ryan, from Monto's Three Moon Motel, said the motel was booked out for the entire weekend with many of the organisers of the air show staying there.
She said: "The people who were with that plane stayed here
"It's terrible, they were absolutely lovely people."
The search area is more than 500 square miles and the plane's emergency beacon is no longer sending out a signal.
