PRIA is one thing, but airlines usually request a copy of your airmen records (with your consent), which is a different animal than when they make a PRIA inquiry. This is where they see part 61/142 check ride failures, etc. Although the record should be expunged, the only way to know for sure is to request a copy of your airmen records. If it's not expunged, it'll be in your airmen records. It's always a good idea to know what is in there before applying to airlines. The FSDO does not have access to this, as it's kept in OKC. Additionally, there are some good guides on the FAA.gov website about PRIA and FOIA. I think these should be mandatory reading for any commercial pilot.