Where can guidance for flight reviews as required by 14 CFR section 61.56 be found?

The correct source for guidance on flight reviews as required by 14 CFR section 61.56 is found in FAA Advisory Circular 61-98. This advisory circular provides comprehensive information and standards related to flight reviews, including the requirements and recommended practices for both pilots and instructors.

While 14 CFR Part 61 contains the regulatory requirements for pilot certification and operations, it does not delve into the practical aspects or detail the procedures associated with flight reviews in the same way that Advisory Circular 61-98 does. The Practical Test Standards book primarily focuses on the standards applied during practical tests for pilot certification rather than flight reviews, and the FAA Flight Instructor Guide offers broader instructional methodologies and teaching principles but is not specifically targeted at the details of flight reviews. Thus, FAA Advisory Circular 61-98 stands out as the most pertinent and authoritative source for this particular topic.