What is the minimum amount of pilot in command time required for an additional rating on a CFI certificate?

To obtain an additional rating on a Certified Flight Instructor (CFI) certificate, the requirement of 15 hours of pilot-in-command (PIC) time is established by the Federal Aviation Administration (FAA) regulations. This requirement ensures that the instructor has sufficient experience to competently teach and evaluate other pilots. The 15 hours of PIC time is specifically designed to foster a level of familiarity and proficiency that equips the instructor with real-world experience necessary for instructing students effectively.

This amount of time allows the CFI to build a diverse set of flying experiences, which is critical for understanding the nuances of instruction in different flight scenarios. Such requirements are a part of the FAA's emphasis on safety and effective training methods, ensuring that instructors have a solid foundation before they begin teaching others.

In contrast, the other options do not align with the established regulatory framework for obtaining additional ratings on a CFI certificate, making them less valid.