When turbulence causes changes in altitude and/or attitude, but aircraft control remains positive, that should be reported as a. light. b. severe. c. moderate. DISCLAIMER Please do not use this video for any sort of instruction, this is for my own memorization purposes only. If you're interested in learning to fly, please consult with a CFI in your area. Further Review: Secondary flight controls - types, purpose and functionality View my playlist for more commercial pilot written test questions! • Valerie's Commercial Pilot Written Test Pr... Thank you for your likes, comments and subscriptions!