The captain of Continental Airlines flight 61 has died while flying the plane from Brussels to New York.
Nearly 250 airline passengers landed safely at their destination after the captain of the plane died mid-flight.
The plane made an emergency landing at Newark Liberty International Airport shortly before 1200 (1600 GMT).
The Continental Airlines Boeing 777 from Brussels to New York landed as scheduled at Newark airport shortly before 1200 (1600 GMT).
Two co-pilots were in control of the plane - a Boeing 777 carrying 247 passengers - said Federal Aviation Authority spokeswoman Arlene Salac.
Two co-pilots took control and landed the plane, authorities said.
An aviation expert told the BBC it was "very rare" for pilots to die while at the controls on an airborne plane.
The 247 passengers knew someone on board had been taken ill but were not told that the pilot had died. Many praised the calm conduct of the crew.
It would appear that the surviving crew [members coped] very well indeed Jim FergusonAviation writer
The captain apparently died of natural causes, the airline said.
Jim Ferguson said it must have been "very difficult" and distressing for the co-pilots to land the plane safely.
He was a 60-year-old man with more than 20 years of service.
The captain apparently died of natural causes, a Continental Airlines spokesman told CNN.
'Distressing'
He was a 60-year-old man with more than 20 years of service to the airline, a spokesman for the airline said.
There were two co-pilots on board - the regular co-pilot and an additional relief co-pilot - when the pilot passed away.
Lucky landing
There was no sign of any trouble - we had a picture-perfect landing in horrible weather and I think we ought to be hailing these people as heroes Passenger
There were two co-pilots on board - the regular co-pilot and, in an apparent stroke of good fortune, an additional relief co-pilot.
Jim Ferguson - an aviation writer from the UK - told BBC News the plane would have been difficult to land with only one pilot at the controls, as might have been the case on flights manned by only two pilots.
Only two pilots are required on twin-engine planes like the Boeing 777, but Mr Ferguson - an aviation writer from the UK - told BBC News the plane would be difficult to land with only one pilot at the controls.
"You could, I gather, land a 777 single-handed - but it would require a lot of effort and it would appear [in this case there was] a very young co-pilot - so if there was another one, that would help.
"You could, I gather, land a 777 single-handed - but it would require a lot of effort and it would appear [in this case there was] a very young co-pilot - so if there was another one, that would help.
"It would be very difficult, very distressing. I don't know if this [scenario] is carried out on simulator training or not.
"It would be very difficult, very distressing. I don't know if this [scenario] is carried out on simulator training or not."
"But it's very, very rare - and it would appear that the surviving crew member carried it out very well indeed."
Mr Ferguson said it must have been "very difficult, very distressing" to land the plane safely.
'No chance' for pilot
"It's very, very rare - and it would appear that the surviving crew member carried it out very well indeed."
Passengers were not told about the events in the cockpit during the flight, but a number of them did respond to an announcement asking if doctors were on board, reported the Associated Press news agency.
Passengers' surprise
Among them was Dr Julien Struyven, 72, a cardiologist and radiologist from Brussels, who went to the cockpit and examined the pilot.
Passengers say they were not told about the events in the cockpit during the flight, though there was an announcement asking if doctors were on board.
Passengers were surprised to be greeted by the emergency services
Many praised the conduct of the crew when they learned of the unusual circumstances of the landing.
"I think this crew deserves a lot of credit for remaining as calm and as professional as they did," an unnamed passenger told Reuters news agency.
"There was no sign of any concern, no sign of any trouble - we had a picture-perfect landing in horrible weather here in New Jersey and I think we ought to be hailing these people as heroes - I mean they did an outstanding job."
Others said they were surprised to see so many emergency services lined up on the runway on landing.
When the crew asked if there were doctors on the flight, Dr Julien Struyven, 72, a cardiologist and radiologist from Brussels, went to the cockpit and examined the pilot.
"He was not alive," Dr Struyven told AP. There was "no chance at all" of saving him, he said.
"He was not alive," Dr Struyven told AP. There was "no chance at all" of saving him, he said.
Dr Struyven said he suspected the pilot had suffered a cardiac arrest. He said he used a defibrillator to try and revive the pilot, but it was too late.
Dr Struyven said he suspected the pilot had suffered a cardiac arrest. He said he used a defibrillator to try and revive the pilot, but it was too late.
Pilots are subject to rigorous medical checks which increase in frequency with age.
Pilots are subject to rigorous medical checks which increase in frequency with age.
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