Need help with getting sounds to play in the air while riding

Thanks for taking the time to read my post, I need guidance - as I have been at it for a week - with getting a motor sound to play while I'm riding my airship in the air! Sounds simple enough, I've tried-- Timers (crash my game), Key bindings (only plays sound while on the ground...oof...) Piles of suggested code with checks and logic loops, (if the sound does play it plays like 20 copies of the same sound... double oof...) The key bindings might work if I could get the sound to loop but not play multiple copies at once, I just cant figure out the code for that.