Incomplete answer. There are three levels of non-revs at American (D1, D2, D3).
-D1: this is a vacation pass; if the seat is empty only an "A" pass (company business) can beat you out.
-D2: this is for the employee, his or her spouse/domestic partner (it can be someone you are just dating and you declare them), dependent children and parents.
-D3: this is for anyone. Yup, anyone who knows someone can get one of these. Each employee is given 16 one way D3 passes. So if you are the child of a pilot, once you are over 21 (I believe) and no longer living at home / dependent, you are a D3 at best. Meaning someone who dealt with all of the crap of living in a family of an employee, is now less senior than somene who is banging an employee and being listed as an employee as their "partner" so to speak.
Cost: D1 and D2 is based on mileage flown, class flown, domestic or international, and years of service. D3 is based on mileage, domestic or international.
Cheers,
777 / 767 / 757