Quick Links Take a Practice Exam Contribute to the Site Browse the Exams About this Site Privacy Policy Terms & Conditions Site Map New User Log In Examine My Cookies Contact WebMaster   Exams4Pilots Forum Forum Home - Latest News - Testimonials - Tips & Tricks - Stuck Mike - Bug Reports - Feature Request	SiteMap You are here: home->com_plt->H745->2.5.2.6.2.A.1 5262 In most helicopters, medium-frequency vibrations indicate a defective A) main rotor system. B) tail rotor system. C) engine.

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