The cockpit access protection system relies upon pass codes for an aircraft
and utilizes the galley area as a security area to verify a person's
identity before allowing access to the cockpit. The system includes normal
operation to ensure that unauthorized personnel do not gain access to the
cockpit. Upon breach of security, the cockpit door is automatically locked
by a computer on the ground. A false signal of security breach can be
overcome by an authorized flight crew member communicating with ground
control upon verification that the report of a false security breach is
not made under duress. The system also allows emergency access to the
cockpit in the event of a medical or other similar emergency.
