Besides the integrity issues, choosing to pass on reporting one's own ****ups, is a path wrought with danger. There's a chance you'll get away with it, of course, or the powers of deduction may lead the company/authorities onto your path, in which case you're well up the proverbial sans paddle.
My advise would be to report it asap, being totally frank and honest. Explain the thought- and action process which led to the "incident" as detailed as possible, and let the chips fall as they may. At least you'll have done your part in an industry, which is supposedly built on safety first and having a just reporting systems. And if you didn't mean to do it, a slap over either fingers or neck should do it.