so many posts asking this question, i'm glad GCN Tech put together a video with some simple ways the average rider can assess if what they're looking at is fine or needs professional help… https://youtu.be/PqCFFbXFhOA?si=v_-xxn9-TcxlS6Gp&t=219
by zed42
1 Comment
tap test at 3:52 is still the cheapest and easiest way to start.
I learned this a long time ago working on F-18s.