As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARBURETORS BEING PRODUCED BY PRECISION AIRMOTIVE ARE NOT IN C/W MARVEL-SCHEBELER AD 63-22-03. THE LETTER 'V' IS NOT STAMPED UNDER THE SERIAL NUMBER. SUBMITTER STATED REQUIRE PRECISION AIRMOTIVE TO RECERTIFY ALL CARBURETORS THEY HAVE PRODUCED THIS WAY OR REVISE AD 63-22-03 TO REFLECT THE CURRENT MANUFACTURING PROCESS.