What regulation must pilots and crew members comply with when performing a functional check flight?

The correct regulation that pilots and crew members must comply with during a functional check flight is OPNAV 3710.7. This document outlines specific procedures and stipulations required for Naval Aviation operations, including functional check flights, which are critical for ensuring flight safety and aircraft performance after maintenance activities or repairs.

OPNAV 3710.7 provides guidance on various elements such as flight crew qualifications, operational risks, and safety measures that must be adhered to during such flights. This is particularly important in a military environment where operational readiness and crew safety are paramount.

In contrast, while FAA Regulations do govern civil aviation and apply to functional check flights for commercial operations, they are not specifically tailored to military aviation contexts. MCO 2020.1 refers to Marine Corps orders, which prioritize different aspects of operations and may not cover the nuances of functional check flights as thoroughly as OPNAV 3710.7. Similarly, a Command Safety Manual typically outlines safety protocols but does not serve as the primary directive for operational procedures related to flight operations.

Overall, compliance with OPNAV 3710.7 ensures that pilots and crew members follow the standardized regulations necessary for conducting safe and effective functional check flights within a military framework.