Which statement describes a possible cause of loss of separation as defined?

• A. Action or inaction by the student leading to a conflict alert, loss of separation, or deviation.
• B. A routine maneuver that maintains separation.
• C. Controller error corrected immediately.
• D. Aircraft flying at the same altitude without conflict.

Answer: (B)

Loss of separation happens when the defined safety buffers between aircraft are not maintained, usually due to how a maneuver is executed or coordinated. Even routine maneuvers, which are normally used to preserve separation, can become a source of loss if they’re not performed with perfect timing, coordination, or clearance. In practice, this means that a routine maneuver has the potential to erode the separation margin if mis-timed or miscommunicated, whereas other statements describe situations that would either not affect separation or would be corrected/avoided before any loss occurs. So the idea here is that a routine maneuver, while intended to maintain separation, represents a scenario where loss could occur if execution slips, making it a plausible cause within the defined context.