In a non-time-available emergency, what must N1 do if there's no call from the flight deck?

In a non-time-available emergency, the proper course of action involves N1 gaining entry to the flight deck when there has been no call from the flight deck. This decision is rooted in the need for N1 to assess the situation and ensure the safety of everyone on board. By entering the flight deck, N1 can determine if the flight crew is incapacitated, as well as obtain essential information about the emergency and the appropriate response actions.

Gaining entry allows for a direct understanding of any potential threats or issues and enables N1 to better coordinate an effective response, whether that involves communicating with the flight crew or activating emergency procedures. This action is critical in fostering a clear line of communication and making informed decisions in a chaotic environment, ultimately prioritizing the safety of all passengers and crew.

Other options, such as evacuating immediately or assessing passenger needs, may not be feasible without first understanding the condition of the flight deck. Beginning crowd control procedures could also be premature, as it is essential to first ascertain the situation in the cockpit to ensure that any actions taken do not exacerbate the emergency.