Final answer:
A CFI cannot renew or reinstate another instructor's CFI privileges. Such procedures must be carried out in accordance with FAA regulations which require specific steps such as flight reviews or practical tests conducted by authorized examiners.
Step-by-step explanation:
As a Certified Flight Instructor (CFI), you cannot renew or reinstate the CFI privileges of another instructor just because they are a friend or you are a CFI yourself. The process to renew or reinstate a CFI certificate is governed by the Federal Aviation Administration (FAA) regulations, which require certain steps to be completed. These usually involve meeting recent flight experience requirements, completing a flight review, taking a renewal course, or passing a practical test conducted by an FAA examiner or authorized check instructor. It is important that CFIs maintain their qualifications through the proper channels to ensure aviation safety and regulatory compliance.