How should an operator manage AD compliance across a mixed fleet with multiple aircraft types?

• A. Aggregate AD inventory by aircraft type, schedule timely inspections, assign responsibilities to CAMO/maintenance, and maintain centralized tracking with deadlines and exemptions.
• B. Check ADs only for the newest aircraft.
• C. Rely on pilots to remember ADs.
• D. Never use centralized tracking to avoid bureaucracy.

Answer: (A)

Managing Airworthiness Directives across a mixed fleet requires a structured, centralized approach that keeps every aircraft type accounted for, with clear ownership and a single source of truth. Aggregating the AD inventory by aircraft type recognizes that AD applicability varies between models, series, and even serial numbers, so you can accurately identify which directives apply to each aircraft in the fleet.

Scheduling timely inspections ensures that every applicable AD is addressed before its deadline, preventing service interruptions and maintaining airworthiness. Assigning responsibilities to CAMO and maintenance creates explicit accountability—someone is responsible for tracking, interpreting, and implementing each directive rather than relying on memory or improvised processes.

Centralized tracking with deadlines and exemptions ties everything together, providing visibility across the entire fleet, facilitating coordination of inspections, and supporting audits and regulatory compliance. It also makes exemptions or alternate dispositions transparent and traceable, so no AD falls through the cracks.

Relying on pilots to remember ADs is unsafe because pilots may not have comprehensive visibility into all applicable directives, especially when multiple aircraft types are involved. Checking only the newest aircraft ignores ADs that can affect older or non-newest models. Avoiding centralized tracking eliminates a reliable control point, increasing the risk of missed or late AD compliance.

This approach ensures consistent, auditable, and timely AD management across a diverse fleet.