After all requirements are met, what action does the T1 controller take?

• A. Issue a weather brief to the crew
• B. Assign flight crew based on seniority
• C. Provide maintenance instructions to the ground crew
• D. Designate the crewmember and aircraft, specify the operating regulation, and may add conditions or limitations

Answer: (D)

The main idea is the flight release authorization. In Part 135 operations, after every prerequisite is satisfied—crew qualifications, aircraft airworthiness, weather, fuel, MEL, and other factors—the person in charge (the T1 controller) issues a formal release to begin the flight. This release designates who will be crewmember(s) and which aircraft will be used, specifies the operating regulation under which the flight will be conducted, and may include any conditions or limitations necessary for safe operation. It’s the official authorization that ties together the crew, aircraft, and regulatory framework for the flight.

Weather briefing, crew assignment by seniority, and maintenance instructions to ground crew happen as part of preparation or other processes, but they do not constitute the release itself.