First and foremost find out what's in your Oak City record.
The easiest way (relatively speaking) is to go to your local FSDO and ask them to look you up in PTRS. That'll tell you if there's anything there to look at. Then you can request copies of everything. Hard to say what you'll get there.
If any investigative or corrective actions are over two years old you need to write a letter and send it certified to the Airmen's Record Center requesting that the actions and files be removed and sealed from your record.
However; and this is the big one, the fact of an action or entry on your record NEVER goes away. Only the details once you request it.
Everything Slamclick said is correct and you would be well advised to remember it.
Even a blown tire on takeoff or landing is in your record if the tower reported it regardless of outcome. Remember that...
Have a nice aviation life
One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533