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Aviation AVI 280. Multiengine Land Prepares the commercial pilot for an FAA multiengine land airplane rating; 18 hours of discussion and 9 hours of flight in a multiengine airplane (7 ½ dual instruction, ½ solo, plus 1. 0 check ride for qualified individuals). Students enrolling in this course will also participate in up to 5 hours of research flight experiments conducted by Institute of Aviation staff. Prerequisite: Commercial Pilot certificate and consent of director. 1 hour.