PARIS/SEYNE-LES-ALPES: French and German officials said there was no indication he was a terrorist. Acquaintances described Lubitz as an affable young man who had given no sign of harbouring harmful intent.
According to Marseille prosecutor Brice Robin, Lubitz acted "for a reason we cannot fathom right now but which looks like intent to destroy this aircraft".
Setting the plane's controls for rapid descent was an act that "could only have been voluntary", Robin said. "He had... no reason to stop the pilot-in-command from coming back into the cockpit. He had no reason to refuse to answer to the air controller who was alerting him on the loss of altitude."
The captain, who had stepped out of the cockpit, probably to use the toilet, tried to force his way back in: "You can hear banging to try to smash the door down," Robin said.
Describing sound recordings from one of the plane's black boxes, Robin said most of the passengers would not have been aware of their fate until the very end.
"Only towards the end do you hear screams," he said. "And bear in mind that death would have been instantaneous...the aircraft was literally smashed to bits."
FlightRadar24, an online air tracking service that uses satellite data, said it had found evidence the autopilot was abruptly switched from cruising height to maintain an altitude of just 100 feet, the lowest possible setting. The plane crashed at about 6,000 feet.
"Between 09:30:52 and 09:30:55 you can see that the autopilot was manually changed from 38,000 feet to 100 feet and 9 seconds later the aircraft started to descend, probably with the 'open descent' autopilot setting," Fredrik Lindahl, chief executive of the Swedish tracking service, said.
The CEO of Lufthansa, parent company of Germanwings, said its air crew were picked carefully and subjected to psychological vetting.
"No matter your safety regulations, no matter how high you set the bar, and we have incredibly high standards, there is no way to rule out such an event," CEO Carsten Spohr said.
Attention will now focus on the motivations of Lubitz, a German national who joined the budget carrier in September 2013 and had just 630 hours of flying time - compared with the 6,000 hours of the flight captain, named in German media only as "Patrick S." in accordance with usual practice.
"Suicide" the wrong word
Robin said there were no grounds to suspect that Lubitz was carrying out a terrorist attack. "Suicide" was also the wrong word to describe actions which killed so many other people, the prosecutor added: "I don't necessarily call it suicide when you have responsibility for 100 or so lives."
The family of the co-pilot arrived in France for a tribute alongside other victims but was being kept apart from the others, Robin said.
Police set up guard outside Lubitz's house in Montabaur, Germany. Acquaintances in the town said they were stunned.
"I'm just speechless. I don't have any explanation for this. Knowing Andreas, this is just inconceivable for me," said Peter Ruecker, a long-time member of the local flight club where Lubitz received his flying license years ago.
"He was a lot of fun, even though he was perhaps sometimes a bit quiet. He was just another boy like so many others here."
A photo on Lubitz's Facebook page, which was later taken down, shows a smiling young man posing in front of San Francisco's Golden Gate bridge.
Robin said the conversation between the two pilots before the captain left the cockpit started normally but that Lubitz's replies became "laconic" as they started readying what would have been the normal descent to the airport of Duesseldorf.
"His responses become very brief. There is no proper exchange as such," he said.
Investigators were still searching for the second of the two black boxes on Thursday in the ravine where the plane crashed, 100 km (65 miles) from Nice, which would contain data from the plane's instruments.
Pilots may temporarily leave the cockpit at certain times and in certain circumstances, such as while the aircraft is cruising, according to German aviation law.
Cockpit doors can be opened from the outside with a code, in line with regulations introduced after the Sept. 11, 2001 attacks in the United States, but the code can be overridden from inside the cockpit. Lufthansa's CEO said that either the pilot had entered the code incorrectly, or the co-pilot inside had overridden it.
Germanwings said 72 Germans were killed in the first major air passenger disaster on French soil since the 2000 Concorde accident just outside Paris. Madrid revised down on Thursday the number of Spanish victims to 50 from 51 previously.
As well as Germans and Spaniards, victims included three Americans, a Moroccan and citizens of Britain, Argentina, Australia, Belgium, Colombia, Denmark, Israel, Japan, Mexico, Iran and the Netherlands, officials said. However, DNA checks to identify them could take weeks, the French government said.
The families of victims were being flown to Marseille on Thursday before being taken up to the zone close to the crash site. Chapels had been prepared for them with a view of the mountain where their relatives died.
A young German co-pilot locked himself alone in the cockpit of Germanwings flight 9525 and set it on course to crash into an Alpine mountain, killing all 150 people on board including himself, prosecutors said on Thursday.
French prosecutors offered no motive for why 28-year-old Andreas Lubitz apparently took the controls of the Airbus A320, locked the captain out of the cockpit and deliberately set it veering down from cruising altitude at 3,000 feet per minute.
German police were searching his home for evidence that might offer some explanation for what was behind Tuesday's crash in the French Alps.
According to Marseille prosecutor Brice Robin, Lubitz acted "for a reason we cannot fathom right now but which looks like intent to destroy this aircraft".
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The captain, who had stepped out of the cockpit, probably to use the toilet, tried to force his way back in: "You can hear banging to try to smash the door down," Robin said.
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"Only towards the end do you hear screams," he said. "And bear in mind that death would have been instantaneous...the aircraft was literally smashed to bits."
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"Between 09:30:52 and 09:30:55 you can see that the autopilot was manually changed from 38,000 feet to 100 feet and 9 seconds later the aircraft started to descend, probably with the 'open descent' autopilot setting," Fredrik Lindahl, chief executive of the Swedish tracking service, said.
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"No matter your safety regulations, no matter how high you set the bar, and we have incredibly high standards, there is no way to rule out such an event," CEO Carsten Spohr said.
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"Suicide" the wrong word
Robin said there were no grounds to suspect that Lubitz was carrying out a terrorist attack. "Suicide" was also the wrong word to describe actions which killed so many other people, the prosecutor added: "I don't necessarily call it suicide when you have responsibility for 100 or so lives."
The family of the co-pilot arrived in France for a tribute alongside other victims but was being kept apart from the others, Robin said.
Police set up guard outside Lubitz's house in Montabaur, Germany. Acquaintances in the town said they were stunned.
"I'm just speechless. I don't have any explanation for this. Knowing Andreas, this is just inconceivable for me," said Peter Ruecker, a long-time member of the local flight club where Lubitz received his flying license years ago.
"He was a lot of fun, even though he was perhaps sometimes a bit quiet. He was just another boy like so many others here."
A photo on Lubitz's Facebook page, which was later taken down, shows a smiling young man posing in front of San Francisco's Golden Gate bridge.
Robin said the conversation between the two pilots before the captain left the cockpit started normally but that Lubitz's replies became "laconic" as they started readying what would have been the normal descent to the airport of Duesseldorf.
"His responses become very brief. There is no proper exchange as such," he said.
Investigators were still searching for the second of the two black boxes on Thursday in the ravine where the plane crashed, 100 km (65 miles) from Nice, which would contain data from the plane's instruments.
Pilots may temporarily leave the cockpit at certain times and in certain circumstances, such as while the aircraft is cruising, according to German aviation law.
Cockpit doors can be opened from the outside with a code, in line with regulations introduced after the Sept. 11, 2001 attacks in the United States, but the code can be overridden from inside the cockpit. Lufthansa's CEO said that either the pilot had entered the code incorrectly, or the co-pilot inside had overridden it.
Germanwings said 72 Germans were killed in the first major air passenger disaster on French soil since the 2000 Concorde accident just outside Paris. Madrid revised down on Thursday the number of Spanish victims to 50 from 51 previously.
As well as Germans and Spaniards, victims included three Americans, a Moroccan and citizens of Britain, Argentina, Australia, Belgium, Colombia, Denmark, Israel, Japan, Mexico, Iran and the Netherlands, officials said. However, DNA checks to identify them could take weeks, the French government said.
The families of victims were being flown to Marseille on Thursday before being taken up to the zone close to the crash site. Chapels had been prepared for them with a view of the mountain where their relatives died.
© Thomson Reuters 2015
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