When can a commercial pilot log SIC time?

A commercial pilot can log Second-in-Command (SIC) time when they meet the qualifications outlined in 14 CFR 61.55 and when operating in an aircraft that requires more than one pilot. This regulation establishes the requirements for pilots to serve as SIC, which typically include holding the appropriate ratings and endorsements for the aircraft category and being familiar with the aircraft’s operating limitations and systems.

To log SIC time, the pilot must occupy a seat in the aircraft that is designated for a co-pilot, and they must be capable of performing the duties of that position. SIC time is valuable for gaining experience and meeting minimum flight hour requirements for various certifications and ratings.

The other options present specific conditions that do not universally apply or do not constitute the correct reasoning for logging SIC time. For instance, simply having over 500 hours of flight time does not automatically qualify a pilot to log SIC time unless they meet the necessary qualifications stated in the regulations. Similarly, simply occupying any seat in a multi-pilot aircraft or having been flying for at least 12 months does not by themselves qualify an individual for logging SIC time, as they must also satisfy the requirements set forth in the regulations to ensure safety and competency in multi-crew operations.