What should a pilot do if ATC instructs them to change altitude?

When Air Traffic Control (ATC) instructs a pilot to change altitude, the appropriate action is to acknowledge the instruction and make the required altitude adjustment. This response ensures compliance with ATC directions, which are essential for maintaining safe and orderly airspace management.

A pilot is expected to follow ATC instructions unless there is a legitimate reason to refuse, such as a safety concern or operational limitation. Acknowledging and executing the altitude change is crucial, as it helps integrate the flight into traffic patterns, avoids potential conflicts with other aircraft, and adheres to the regulations governing aviation operations.

The air traffic control system operates on clear communication and adherence to instructions, which contributes to the safety and efficiency of the airspace. Therefore, complying with altitude changes is a fundamental requirement for all pilots when operating under ATC jurisdiction.