Which door does the No.1 PDI perform checks at?

The No.1 PDI (Pre-Departure Inspection) is responsible for performing checks primarily at the L1 Door. This door is designated as the main entry point for passengers and crew, making it a critical focus area during safety and operational checks before departure. The L1 door is vital for ensuring that the boarding area is secure and that all necessary safety features are operational.

Other doors, such as L2, R1, and R2, may be monitored during the overall safety checks, but they do not fall under the specific responsibilities of the No.1 PDI. Each crew member has defined roles and assigned doors for checks, which helps streamline the boarding process and maintain a high level of safety. Focusing on the L1 Door ensures that the most utilized entry point is secure and fully operational, thereby enhancing the overall safety protocols of the aircraft.