Full IssueSubscriber Only Download the Full March 2020 Issue PDF Classics and Warbirds Propeller Overhauls Which Engine Oil Daher TBM 940 Cessna Cardinal 177RG To continue reading this article you must be a paid subscriber Subscribe Subscribe to Aviation Consumer Start a subscription to Aviation Safety for just $18. And access all of our online content - over 2,000 articles - free of charge. Subscribe today and save 48%. It's like getting 3 months FREE! Already Subscribe?Click Here to Sign In | Forgot your password?