Don't you have to have 3 takeoffs and landings within the preceding 90 days in an aircraft of the same category (airplane) and class (single-engine land) if you want to carry passengers. I could be wrong, its been a while since I've looked at the reg. Regardless, if your 121 PC was not recorded as a BFR, does it still count? When we did 141 stage checks (not for a certificate or rating), if a student wanted it to count as a BFR, the Fargo FSDO's interpretation was that those checks, though they were "proficiency checks" needed to be recorded specifically as BFRs. It feels to me like the same would be true of 121 proficiency checks.