Doors and Windows Flashcards
How is the flight deck door locked?
The flight deck door is locked by three electric locking strikes, the status of which are monitored on the overhead panel.
When would the flight deck door automatically unlock?
Pressure sensors located on the panel automatically unlock the door if cabin depressurization is detected. The door will also automatically unlock if electrical power is lost.
The FAULT light on the pedestal will illuminate to indicate any problem with the pressure sensors or electric locking strikes.
What is the CDLS?
Cockpit Door Locking System (CDLS) allows the door to be unlocked by entering a pre-programmed code into the keypad.
There are two different types of flightdeck access requests made from the keypad:
- Routine access request
- Emergency access request
How does the CDLS Emergency Access Request unlock the door?
If no action is taken by the flight crew after a predetermined time, the door automatically unlocks for 5 seconds and it may be pushed open. The flight crew may refuse entry by selecting LOCK which inhibits the keypad and buzzer for a short period of time. The flight crew can revert to NORM by momentarily selecting the switch to UNLOCK.
How would the flight crew know that the emergency access code had been entered?
If a continuous buzzer is heard, the emergency access code has been entered. Unless you desire emergency assistance in the flightdeck, either pilot should immediately move the selector to LOCK and contact the lead flight attendant.
For the external doors, the red warning light illuminates if all of the following conditions exist:
- The aircraft is on the ground
- Both engines are shut down
- The cabin is still pressurized
What does the amber EMER EXIT indication on the DOOR page represent?
The amber EMER EXIT indication on the DOOR page indicated that either the handle cover is not in place or the emergency exit is open.
