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 COMPLIANCE WITH MARVEL-SCHEBELER AD 63-22-03. THE LETTER 'V' IS NOT STAMPED UNDER THE SERIAL NUMBER. SUBMITTER STATED REQUIRE PRECISION AIRMOTIVE TO RECTIFY ALL CARBURETORS THEY HAVE PRODUCED THIS WAY OR REVISE AD 63-22-03 TO REFLECT THE CURRENT MANUFACTURING PROCESS.