The 8900 is sometimes quoted as a reference when trying to determine FAA policies.
What exactly is it and where can it be found? Is it regulatory in nature?
The Flight Standards Information Management System, created by FAA Order 8900.1, is the source of all information relating to aviation safety inspector job tasks. It's about 8,000 pages worth of (non-regulatory) guidance and policy helping FAA Inspectors to do their job properly.
There's all kinds of good stuff in there, such as:
And lots more!
FSIMS is open to the general public - if you want to know what an inspector does day in and day out (or what to expect when you meet one), FSIMS is the one-stop-shopping location for the answers to all your questions.