As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SENT TANK (AMO110-90) FOR REPLACEMENT OF OUTLET FITTING COLLAR DUE TO DAMAGED THREADS. ON RETURN, FOUND THREADS IN NEW FITTING TO BE SEVERELY DAMAGED OR DEFECTIVE. RETURNED TANK FOR REDO. EITHER NO INSP OF PART BEFORE WELDING NOR INSPECTION OF COMPLETED WORK. THREADS MUCH WORSE AFTER REPAIR THAN BEFORE. APPARENTLY NO QC INSPECTION CARRIED OUT.