Years ago, flying from Denver to California, I looked out the window and saw liquid, presumably fuel, spraying from the wing. Casually, I notified the flight attendant. She looked, and casually walked up to the flight deck. Soon the pilot came back and took a look. He told me “Don’t worry about it.” and returned to the flight deck. No one, on a full flight, noticed any of this. I watched it all the way to CA. It had the appearance of a garden nozzle type spray. No problem.
I was on a flight from Dallas to Austin on Southwest Airlines I’ve been flying all my life Dad worked for American and I’m a person that looks over the plane when I’m getting situated. I’ve got a window seat I look out to the wing and everything looks fine to me. When we get airborne I order a drink and I look out about 10 minutes into it the flight look out to see 14 screws backing out of an access panel I snagged a flight attendant and ask her for a double. I kept my mouth shut till We were on the ground and then I was the last off the plane. The Stewardess came back to me and said are you OK I pointed out the window and told Her that I watched the screws back out for last 30 minutes of our flight.