Passenger Attempts Unauthorized Cockpit Entry, Highlighting Aviation Security Concerns

A passenger on a United Airlines flight tried to enter the cockpit while the plane was preparing for departure from Chicago to Los Angeles. This violated strict rules against cockpit access.
The United incident is one of several in recent years where passengers have attempted to breach the cockpit, causing disruptions.
Airline pilots also face consequences if they allow unauthorized people into the cockpit, even inviting passengers after landing.
There are very strict rules around cockpit access for unauthorized people, including passengers, to maintain security.
These types of incidents highlight potential aviation security risks if passengers can access the cockpit.

simpleflying.com

Relevant topic timeline:

8/11/2023

Miscommunication between pilots caused United plane to drop near ocean’s surface, investigation finds

Main Topic: Miscommunication between pilots led to a United Airlines plane diving shortly after takeoff from Hawaii. Key Points: 1. The crew failed to manage the plane's path, airspeed, and nose direction after a mix-up between the captain and co-pilot. 2. The co-pilot misheard the captain's instruction to reset the wing flaps, resulting in the plane climbing and then dropping towards the ocean. 3. Both pilots heard the ground proximity warning system and were able to recover, continuing the flight without further incident.

9/9/2023

Unruly Passenger Forces United Flight to Return to Gate at O'Hare

A passenger on a United Airlines flight from Chicago to Los Angeles was arrested after attempting to enter the cockpit and open the exit doors, causing the flight to return to the gate.