holly🌟 on Instagram: "A crucial part of preflight checks: Hand turning the propeller. For many aircraft, this action might seem unconventional or even risky. BUT, with the Rotax 912 engine, it’s a key step in our pre-flight routine. Why? This process ensures everything’s in order for a safe flight, however the reason it’s safe and necessary might surprise you. Can you guess why?⬇️⬇️ #rotax912 #oil #aviation #sling2"