Land Search and Rescue volunteers were then forced to make their way up on foot to recover the man's body.
The death has been referred to the coroner, police said.
Pilot Nat Every said the cause of death was medical-related and while they had been busy attending to callouts at Tongariro Crossing, that wasn't anything unusual.
"There are 80,000 people each year that go through the crossing. If you sprain your ankle in the local park you can hobble over to your car but three hours in the crossing, you can't get out. It's just an isolated area."
Mr Every said callouts were frequent as a lot of people went through the crossing in a short period of time.
Turangi Alpine Shuttle driver Colin Baker said people needed to take precautions when climbing Mt Ngauruhoe or tackling the crossing.
He spent several years working on the mountain and was previously a volunteer hut warden.
"Injuries are happening too often to be honest. A lot of it has to do with the fact that climbers are used to being around sea level. People often underestimate the altitude, even on the Central Plateau, it's not that high but altitude does have some effect on you," Mr Baker said.
He said some visitors also underestimated how fast weather conditions could change.
"You see a lot of people go up there in the wrong dress code, they're not prepared for the four seasons in one day that we have."
The Greenlea Rescue Helicopter was also called to Aratiatia on Saturday where a 51-year-old man had been kicked by a horse. He was flown to Waikato Hospital with serious leg and pelvic injuries.