The flight instruction of other pilots by an airline transport pilot is restricted to?

The correct choice indicates that airline transport pilots are allowed to provide flight instruction for a maximum of 36 hours in any 7-consecutive-day period. This restriction is established to ensure that pilots maintain a certain level of operational readiness and safety. It helps to prevent fatigue and promotes a focus on quality training rather than quantity. The intent behind this limit is essential in the aviation industry because instructing other pilots requires not only a thorough understanding of flying but also the ability to effectively communicate and teach the material.

Understanding these limitations is crucial for maintaining safety in aviation operations. By enforcing this type of regulation, the FAA aims to ensure that both the instructors and their students are able to complete flight training without the risk of degradation in performance due to fatigue. The other options do not align with the regulatory standards set forth for flight instruction by airline transport pilots.