According to the JAR OPS 1, when a commercial transport passenger aircraft is equipped with a door in the flight crew compartment area, this door must include:
Domanda 307, Operational Procedures - ATPL - Airline Transport Pilot license
| A device preventing the flight crew from being locked in the cockpit. |
| A locking system to prevent any unauthorized access. |
| A sealing system which, in case of depressurisation in the compartment area allows the maintenance of the pressure in the cockpit for as long as possible. |
| Distinctive red or yellow coloured markings indicating the access area (in case of a blocked door). |
