What is NOT part of the required minimum PPE for the flight line?

The correct choice indicates that safety goggles are not part of the required minimum personal protective equipment (PPE) for the flight line. While safety goggles may be beneficial in certain operational environments to protect the eyes from debris or chemicals, they are not universally mandated for all personnel working on the flight line.

Minimum PPE requirements typically focus on protecting against the most common hazards in the specific aircraft operation environment. This usually includes items like gloves to protect the hands, steel toe boots for foot protection, and hearing protection when working in high-noise environments caused by aircraft engines and other operational equipment.

Therefore, while safety goggles are important in many settings, they are not always listed as a requirement in the same manner as the other types of PPE that directly protect against the most prevalent risks associated with work on the flight line.