As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PERFORMING NUMEROUS ANNUALS ON AIRCRAFT USING THIS TYPE OF FUEL DRAIN, SUBMITTER FOUND CLOSE TO 15 PERCENT OF THE FUEL DRAINS CRACKED AT THE TOP OF THE DRAIN NEAR THE SEALING SURFACE. IF UNDETECTED, THIS COULD LEAD TO THE INNER PARTS OF THE DRAIN FALLING OUT AND DRAINING FUEL. SUBMITTER RECOMMENDS CLOSE INSPECTION OF THE DRAIN WHENEVER IT IS REMOVED FOR ANY REASON.