During a T-6 flight, what should you do if you notice abnormal vibrations?

When experiencing abnormal vibrations during a T-6 flight, investigating the cause is crucial for maintaining safety. Abnormal vibrations can signify various underlying issues, such as problems with the engine, propeller, or airframe. By prioritizing an investigation, you can assess the severity of the situation, gather additional information on the vibrations, and decide the best course of action moving forward.

Continuing with the flight plan does not address the potential risk that the vibrations could pose. If left unchecked, they might lead to more significant problems, so it's essential not to ignore the symptoms.

Immediate landing may seem like a prudent option, but it is better to ascertain whether the vibrations indicate a minor issue or a critical failure. Not all abnormal vibrations necessitate an immediate landing, and the situation should be evaluated first.

Performing a series of maneuvers can potentially exacerbate the problem by adding more stress to the aircraft and could escalate any existing issues, particularly if the source of the vibrations relates to the structural integrity or handling characteristics of the aircraft.

In summary, investigating the cause of abnormal vibrations is the most responsible and logical first step to ensure both safety and informed decision-making in the cockpit.