Cockpit security method for aircraft involves providing bolt retractor to retract locking bolt to door release direction due to pressure difference between opposing sides of aircraft cockpit door

摘要

The method involves providing a door (14) in the door frame (16) of the cockpit of an aircraft. A locking bolt (12) is provided in the door to lock the cockpit door. A bolt retractor (10) retracts the locking bolt to a lock release direction due to the presence of a pressure difference of a predefined magnitude between the opposing sides of the cockpit door.