Pilot Jan Cocheret wrote about his fears about cockpit suicides last month . The pilot was killed in a plane crash on March 11 after the jet he was piloting crashed into an airport runway at Amsterdam's Schiphol airport. Mr Cocheret highlighted how security measures could cause problems . Andreas Lubitz crashed the jet carrying 150 people into the Alps at 400mph .
Pilot Jan Cocheret wrote about his fears about cockpit suicides last month . He said he was afraid to return from the toilet to find the door locked . Mr Cocheret highlighted how security measures could cause problems . Andreas Lubitz crashed the jet carrying 150 people into the Alps at 400mph .