This economical text is not as current as the various privately written Powerplant textbooks and thus lacks information relevant to some
of the most modern aircraft systems (most noticeable regarding turbine powerplants).  It is also less graphic and does not feature some of the step by step instructions on common procedures as is more typical with the private texts.  However, as a basic text and reference it is sufficient and applicable and is therefore still used by many certificated AMT schools and training centers.