I fly for a major airline. I bring my accordion to work with me every time. I would never check an instrument as checked baggage.Asside from the rough handling that you may have seen, checked baggage go through rough handling by conveyor belts and other devices. Bags routinely roll over and stop at bumpers and the like. Regardless of how hard the case is or how well it is secured, your instrument will get jarred or hit in some manner.
Hey Jean,
Take it with you on the plane if you can. I had an experience with an airline coming back from Augusta a few years ago. I was on my last leg of the trip in Cincinnati, Ohio. When I got ready to board the plane, the lady at the door told me I will have to check in one of my accordion as baggage. I had 2 of them, one in hardcase and another in a softbag that I purchased from Jr Martin store. It was the softbag one she wanted me to check in. So I gently protested and ask for a supervisor. The plane we were boarding was a smaller plane, thus smaller overhead bins. While we were waiting, she took another look at my softcase, and it was the kind that had side pockets on it. Well I had a couple of books in them for reading on the flight. She said if you take the books out is should fit. So I glady took them out and got my ass on the plane quickly. The case fit easily with no problem. So plane size is a thing to check. Make sure you know the measurements they allow carrying on items.
Later
Mark