"A first reading shows that the pilot in the cockpit used the automatic pilot to descend the plane towards an altitude of 100 feet (30 metres)," said the French BEA crash investigation office in a statement.
    
"Then, several times during the descent, the pilot changed the automatic pilot settings to increase the aircraft's speed," added the investigators.

Read more: Germanwings co-pilot searched internet for suicide methods

    
The latest information appeared to confirm the theory that co-pilot Andreas Lubitz deliberately smashed his plane into the mountains, killing all 150 people on board.
    
Authorities found the second black box, which contains technical flight data, on Thursday after a gruelling nine-day search in difficult mountain terrain.

Read more: Lufthansa executives visit Alpine crash site where 150 died

    
The box, found blackened by the fireball and buried deep in the mountain scree, was transported to Paris late on Thursday and specialist investigators began to analyse the data immediately.
    
"Work is continuing to determine the precise sequence of events during the flight," the BEA said.
    
Data from the first black box, which records conversations in the cockpit, suggested that Lubitz, 27, locked his captain out and then deliberately set the plane on a deadly collision course with the mountains.
    
The plane smashed into the mountains last week at a speed of 700 kilometres an hour, instantly killing everyone on board - half of them German and more than 50 from Spain.
    
It emerged yesterday that Lubitz had searched online for information about suicide and cockpit doors.

Read more: Video shows last seconds of Germanwings flight before crash

    
German prosecutors have said Lubitz was diagnosed as suicidal "several years ago", before he became a pilot.
    
Lufthansa, the parent company of Germanwings, has come under huge pressure since the crash after it was revealed that Lubitz had told his bosses that he had suffered from severe depression.
    
The German flag carrier said the co-pilot had told the airline in 2009 about his illness after interrupting his flight training.
    
Doctors had recently found no sign that he intended to hurt himself or others, but he was receiving treatment from neurologists and psychiatrists who had signed him off sick from work a number of times, including on the day of the crash.

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