If ATC issues an instruction that contradicts a TCAS RA, what must the pilot do?

In situations where Air Traffic Control (ATC) issues an instruction that contradicts a Traffic Collision Avoidance System (TCAS) Resolution Advisory (RA), the pilot must prioritize passenger safety and immediate collision avoidance. The TCAS RA is designed to assist pilots in maintaining safe separation from other aircraft, and it becomes paramount for the pilot to follow the resolution advisory provided by the TCAS.

The correct approach is for the pilot to immediately follow the TCAS RA. This is because the TCAS system is designed to prevent collisions and provide real-time advisories that are crucial for safety. Pilots are trained to give precedence to TCAS alerts over ATC instructions in such circumstances, as safety takes priority over procedural compliance. Thus, adherence to the TCAS resolution advisory not only aligns with the established protocol for ensuring flight safety but also reflects the operational commitment to effectively managing potential collision risks in real-time scenarios.