Claim: Captain Sondenheimer of Germanwings Flight 9525 performed multiple attempts to unlock the cockpit door; he tried his code but was it disabled from the cockpit controls; requested re-entry using the intercom where he he knocked and then banged on the door but received no response; finally, tried to physically break down the door but as it was reinforced to prevent intrusion.
Evidence: The flight's pilot in command was 34-year-old Captain Patrick Sondenheimer, who had 10 years of flying experience (6,000 flight hours, including 3,811 hours on the Airbus A320) flying A320s for Germanwings, Lufthansa, and Condor. Robin said when the captain returned from probably using the toilet and tried to enter the cockpit, Lubitz had locked the door. The captain had a code to unlock the door, but the lock's code panel can be disabled from the cockpit controls. The captain requested re-entry using the intercom; he knocked and then banged on the door, but received no response. The captain then tried to break down the door, but like most cockpit doors made after the September 11 attacks, it had been reinforced to prevent intrusion.