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->ama->L01->L.8.3.8.7.A.1 8387 To prevent external and internal leakage in aircraft hydraulic units, the most commonly used type of seal is the A) O ring seal. B) chevron seal. C) gasket seal.

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