Abraham's ARENA: Killer pilot Andreas Lubitz told ex-girlfriend that he was planning an odious act that will be remembered forever before crashing Airbus A320

Andreas Lubitz the pilot who deliberately crashed a Germanwigs plane had told his ex-girlfriend he was planning an act so terrible his name would be remembered for ever.

Lubitz was a tormented, erratic man who was a master of hiding his darkest thoughts and would wake up from nightmares screaming ‘we’re going down’, his former partner said.

She revealed to a German newspaper how Lubitz ominously told her last year: ‘One day I will do something that will change the whole system, and then all will know

my name and remember it.’

When she heard about the crash of Germanwings Flight 4U9525 on Tuesday, she remembered Lubitz’s menacing prophecy. ‘I never knew what he meant, but now it makes sense,’ she told Bild.

His personal problems and erratic behaviour was so severe that she was frightened and decided to leave him.

She added: ‘When I heard about the crash, there was just a tape playing in my head of what he said, “One day I will do something that will change the system and everyone will then know my name and remember me”.

‘I did not know what he meant by that at the time, but now it’s clear.’

Police will want to interview the unnamed former girlfriend in detail about the pilot’s state of mind. The couple had been together for seven years and lived in a smart flat on the outskirts of Dusseldorf. One report claimed they were engaged and planned to marry next year.

Lubitz had reportedly ordered two new Audis for them just before the tragedy in an apparent desperate last attempt to win her back. But she appeared to have rejected his offer, as only one car was ever delivered.

The startling revelations that Lubitz had long-plotted a spectacular act adds weight to claims the pilot concealed a medical condition that should have stopped him flying.

It comes after German investigators yesterday revealed the 27-year-old should have been off sick on the day he deliberately condemned his 149 passengers and crewmates to their deaths in the Alps.

Investigators revealed today that medical sign-off notes were found at Lubitz's home - including at least one that covered the day of the crash - and Dusseldorf University Hospital confirmed he had been a patient there over the past two months, although it would not disclose his condition.