What action should you take in response to a vertical speed change greater than 500 feet/minute?

When responding to a vertical speed change greater than 500 feet per minute, it is essential to investigate the situation, as this sudden change may indicate the presence of wind shear. Wind shear is a rapid change in wind speed and/or direction over a short distance in the atmosphere, and it can significantly affect an aircraft's performance during takeoff, landing, and in-flight. Rapid vertical speed changes can also suggest a turbulent environment, which could lead to challenges in maintaining control of the aircraft.

By investigating the vertical speed change, pilots can assess the situation more thoroughly and determine the appropriate response, such as adjusting flight parameters or alerting air traffic control. This proactive approach can enhance safety by allowing pilots to avoid potentially hazardous conditions.

Other options do not adequately address the seriousness of the situation. Ignoring a significant vertical speed change can lead to dangerous conditions, while altering the flight course immediately might not be warranted without further assessment. Likewise, avoiding altitude changes without understanding the cause of the speed change could leave the aircraft vulnerable to emerging hazards.