This document was published by Lycoming (around 1998 I think) to recommend more conservative operating procedures than what is officially published in their PO (and mirrored in Pipers POH). It has become common knowledge in our fleet that if you operating their TIO-540-AE2A engine to cruise at peak TIT (their official guidance and limitations) it will be at the expense of longevity. These recommendations are more reasonable. MMOPA recommends that you print this guidance and save with your permanent aircraft records.