It's the Pilot's ( not the manufacturer's ) responsiblity to make sure the plane is flight worthy.

Sad to hear of the problem, but this will not be the last time something like this will come up if you keep flying.

Not only should you check the carb screws but you should check the engine mounting screws, muffler screws, servo screws, piston head cap screws, engine back cover screws, etc.

All of these components are being subject to vibration, heating and cooling cycles which will cause the screws and fastners to loosen over time.

If you go back and check the engine's cap screws I'm SURE you'll find that they are loose now! A good 1/2 turn or so!!! Go ahead and check.


You should remove them one at a time, apply a bit of locktite to the screw, then warm the engine with a heat gun before re-inserting the screw.

Every dozen or so flights you should recheck tightness again.