I'm a young pilot, in my 20's. I finally gained employment as a commercial pilot... I'm building my hours as a jump pilot as well as a glider tow pilot. I'm aiming for the airlines eventually, but yesterday I may have done something that could prevent that form happening... Here's what happened...

I'm in a flying club. I apparently flew the plane (Piper Cub) with some inspection plates missing underneath the belly. I missed them on my preflight, but one of the members noticed later on after I got back that those plates were gone. She might call the FAA about this.

Do missing inspection plates make an aircraft un-airworthy? Should I be worried? I know it was a poor preflight, but is a NASA form appropriate here?

Thanks for any help.