Which item is verified by the T1 controller to ensure the aircraft is properly equipped for designation?

• A. The aircraft has a current airworthiness certificate.
• B. The aircraft is on D085 and airworthy.
• C. The aircraft is within 50 miles of base.
• D. The aircraft has a valid maintenance log.

Answer: (B)

When an aircraft is designated for a flight, the controller checks two key things to ensure it’s properly prepared. First, the aircraft must be on the D085 list, which is the operator’s designated roster of aircraft approved for use in the current designation or program. Being on this list confirms the airplane is the approved configuration and equipment for the assignment. Second, the aircraft must be airworthy, meaning it meets the required safety and certification standards and has no active unairworthy conditions. This combination—being on the official designation list and being airworthy—ensures the aircraft is both authorized and safe for the planned operation. Simply having a current airworthiness certificate doesn’t guarantee it’s on the approved designation, and factors like proximity to base or a maintenance log alone don’t address the specific designation approval and current airworthy status.