Which of the following is not a type of inspection referenced in BLOCK 5 of the AFTO Form 781H?

• A. Thru-Flight (TH)
• B. Quick Turn (QT)
• C. Visual Inspection (VI)
• D. Walk Around Inspection (WAI)

Answer: (C)

The correct answer is identified as Visual Inspection (VI), which is not listed as a type of inspection in BLOCK 5 of the AFTO Form 781H. In the context of the AFTO Form 781H, specific inspections are required to ensure the airworthiness and operational readiness of aircraft. Each type of inspection serves a distinct purpose and is defined in accordance with maintenance and operational standards.

Thru-Flight (TH) is designed to ensure that an aircraft is ready for flight by checking essential systems and components that might be affected over time or during previous flights. Quick Turn (QT) inspections provide a thorough but expedited check of the aircraft's key components, allowing for efficient turnaround times between missions. The Walk Around Inspection (WAI) involves a visual check of the aircraft from the ground to identify obvious issues such as fluid leaks, loose panels, or any signs of damage.

In this specific context, Visual Inspection (VI) is not referenced in BLOCK 5, as the inspections listed are more formalized checks with specific procedural requirements. Understanding the distinctions among these inspections is crucial for personnel involved in aircraft maintenance and operational safety, as it ensures compliance with policies and the ongoing safety of flight operations.