I'm sure there won't be a shortage of replies on this thread. However, I would just point out that with a gas engine especially, you must retighten all of the bolts related to the engine after starting it up for the first time, because they come loose after running the engine for the first time. If you look on TBM's website, you will see that they tell you that after tightening up a prop for the first time, you should run the engine for a couple of minutes and then re-tighten the propellor, and that if you don't re-tighten it, it will come off. Also, a good pre-flight can eliminate the inevitable things like this that always plague this sport. There are a lot of things to check before making a first flight on a plane especially. Taking the time to give the plane a thorough going over can not only give you a better chance for a successful maiden flight, but is also mandatory from a safety standpoint. Use lock-tite on screws on a plane of this size especially. Also, turn to your fellow club members for a hand and follow their advice.