If the FARs and the AIM comprise the bible of flying, the practical test standards (PTS) would be favored hymn books. But, just as the worlds religions occasionally modernize themselves, the FAA is getting ready to burn PTSes on the pyre in exchange for a completely new system.The new system, known as the Airman Certification Standards (ACS), is a major overhaul of the certification process effecting every license and rating. Whether youre thinking about adding to your ticket, are an instructor or you simply plan to get an IPC, it would behoove you to know a little about these changes before they arrive. The last thing you want is that deer-in-the-headlight look if the instructor asks you to review the pertinent ACS.