What must cabin crew advise the PIC of prior to the take-off roll?

Prior to the take-off roll, cabin crew are required to keep the Pilot-in-Command (PIC) informed of important safety-related issues that could affect the aircraft's performance or safety during takeoff. Advising the PIC about debris adhering to the aircraft structure or passenger concerns about wing contamination is vital because such factors can pose a significant risk during takeoff.

Debris on the wings could disrupt the airflow, affect lift, and ultimately compromise the aircraft's performance, particularly in the critical phase of takeoff. Similarly, passenger concerns regarding contamination, such as snow or ice buildup, must also be reported to the PIC, as these issues require assessment and potential action to ensure a safe departure.

Other aspects, like general passenger concerns or technical issues, while important, do not directly pertain to immediate safety and performance concerns related to the aircraft's readiness for takeoff, making them less critical to communicate during this specific phase.