7.5Credit(s) Lecture5 Lab7.50 Aviation Powerplant IV investigates the subject areas of unducted fans and auxiliary power units, completes the second half of the subject area of reciprocating engines, and finishes the last two-thirds of the subject area of turbine engines. This course also contains a comprehensive powerplant review and testing section which helps students prepare to take the FAA powerplant written, oral and practical exams for the issuance of a powerplant rating.