Which condition triggers supervisory notification in abnormal tower operations?

• A. When traffic safety is compromised.
• B. When weather changes.
• C. When a taxiway is closed for maintenance.
• D. When runway lighting changes.

Answer: (A)

In abnormal tower operations, a supervisor should be notified whenever traffic safety is compromised. That means if the level of risk to aircraft or people becomes higher than acceptable—such as situations where aircraft separation cannot be assured, a safety threshold is breached, or an equipment issue prevents safe control—escalation is needed to bring additional authority and resources to restore safe conditions. The other events listed (weather changes, a taxiway closure for maintenance, or runway lighting changes) can be important operational factors, but they don’t by themselves indicate an unsafe situation unless they actually impact safety. In normal cases, these are managed through standard procedures and communications, not automatic supervisory escalation.