As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VALVE SEPARATED FROM MODULE UPON 45 PSI PROOF PRESSURE TEST. MOUNTING LUGS FAILED AND BROKE OFF, BLOWING THE VALVE OFF THE UNIT. FATIGUE AND INSUFFICIENT MATERIAL ON MOUNT LUGS TO HANDLE PROOF PRESSURE. LOWER PROOF PRESSURE TEST OR REDESIGN MOUNTING LUGS TO WITHHOLD THE PRESSURE. (MECHANIC WC, JOB NR 194178) (K)