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->amp->L02->L.8.5.8.8.A.1 8588 Upon inspection of the spark plugs in an aircraft engine, the plugs were found caked with a heavy black soot. This indicates A) a lean mixture. B) a rich mixture. C) worn oil seal rings.

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