Hi there, I work at the AA, happen to have read this thread and thought I may be able to help by clarifying this point. In brief, the AA does apply call out limits to membership breakdown cover which is designed to keep the membership affordable. Depending on your type of membership, the maximum number of call outs for each membership year are limited to 5 for a Single membership, 7 for Joint membership and 8 for Family. Separate limits apply to vehicle based membership and Stay Mobile.
I hope you found this helpful and if you need further information the link to the AA's website is
http://www.theaa.com/...terms-conditions.html