Unfortunately, they don't care.
I had a DUI arrest from 13 years ago. The BAC had two different readings. It was fully dismissed by the district attorney. I went on to even have the arrest records fully expunged by the state judge. It is no where on my driver's records, arrest record, or the national driver's registry. I even sent them the NC statue that states I never have to report this to anyone and I will never be accused of perjury. But since my licesne was suspended for 30 days, they don't care. I am still not sure how this is legal. But again, they don't care.
Even lawyers argue that issue among themselves. Sometimes pretty heatedly. I'm pretty well versed on both sides. Also, I was doing expunction work, so I got extra interested and did some research on this some years ago. This is a cut and paste from my personal write-up - general information; not legal advice for anyone's specific situation:
Here's the problem. The effect of state law expungement of a criminal conviction on a federal issue is an incredibly complex one, with zero in reliable guidance from the federal courts (this is not just an FAA issue). Add to the mix that, practically speaking, expungement affects records, not reality. Expungement doesn't mean it didn't happen. If the local paper reported it, or friend who knew talked about it on Facebook, or appears in some pre-expungement database, the information is out there and can be found.
The FAA's current viewpoint is pretty clearly reflected in the MedXpress User Guide,
https://medxpress.faa.gov/medxpress/Content/Docs/MedXPressUsersGuide.pdf
If the record of a conviction has been expunged, state the date that the record was expunged and the court that ordered the expunction.
Pretty direct.
After several years of talking around the issue (in many of the cases there wasn't actually an expunction, the NTSB settled the issue (at least from their standpoint) in
FAA v Tushin (2021),
https://www.ntsb.gov/legal/alj/OnODocuments/Aviation/5902.pdf.
failure to disclose an expunged arrest under Question 18.v. when a respondent failed to read instructions amounted to intentional falsification because it exhibited willful disregard for truth or falsity of the answer.367 Our holding applies here because both questions, 18.v. and 18.w. seek disclosure of past criminal record, even if subsequently expunged or vacated.
The NTSB did leave one door open a crack. It
might still be a defense to a claim of intentional falsification
if it was on advice of counsel.
A further twist is state expunction law itself. Expunction in some is not an absolute. IOW, an expunged record in some states is still available for specific purposes. examples are certain types of state employment; later offenses; perhaps ironically, to later requests for another expunction. The answer to the federal question could turn out to be different for different states.
@Al1606, that last point applies to North Carolina. If you look at NC's expunction law, there are exceptions where the state can retrieve and use your expunged record. A big one is, it you are charged with an offense at a later date, the DA can retrieve the record in order to show you had - ready for this? - a previous conviction! If you want to read the statute,
here it is. That record can be used, for example, to increase offense levels due to a prior conviction, increase penalties due to a prior conviction, even to form the basis for charging someone as a habitual offender. because they have...multiple prior convictions.
So, how "expunged" is "expunged"? If the state can use it, why can't the Feds?