What type of exam might the Federal Air Surgeon conduct for a non-worsening condition?

The appropriate type of exam that the Federal Air Surgeon might conduct for a non-worsening condition is a medical history review. This assessment allows the medical personnel to gather comprehensive information about the individual's health over time, particularly focusing on any ailments or conditions that have not worsened.

A medical history review is crucial because it helps determine if a pilot is still fit for duty while ensuring that any existing conditions do not pose a risk to flight safety. This process can include checking for any prior medical issues, current medications, and how the pilot has managed their health without significant changes.

In contrast, a written knowledge test primarily evaluates a candidate's understanding of aviation regulations and procedures, which is unrelated to health assessments. A practical exam assesses an individual's flying skills rather than their medical history. A psychological evaluation focuses on mental health aspects, which may not be relevant if the concern is strictly medical and non-worsening.

Therefore, conducting a medical history review is the suitable examination method for the Federal Air Surgeon in this context, as it aligns directly with monitoring the pilot's health status for any non-worsening condition.