Fellow G-tard:
A word of caution. The Porter book was written mainly with a heaping dose of uneeded info from the maintenance manuals and sometimes gets entirely too in-depth even for your own good. A rash of NH and upgrades had troubles with their respective systems classes due to this book. Stick to what you have with regards to online sys presentations and your CFM. There are other study guides that won't screw you over, like GP book. Don't get yourself into trouble by learning too much.
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