The three were pronounced dead on arrival at the Kiunga hospital.
Western Provincial Police Commander Joseph Puri said a pilot, a helicopter from a drilling company based in Kiunga, spotted the crash and quickly transported three survivors to the Kiunga hospital but all three were declared dead on arrival.
PPC Puri said the aircraft was approaching the airport at around 2.20pm when the accident happened.
“The fixed-wing plane crashed into the shallow swamp at about 2.20pm, a kilometre from Kiunga airport,” Puri said.