As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ONE OF OUR NEWLY MNUFACTURED COMPRESSION BLOCKS SAGGED WHEN INSTALLED DURING REGULAR MAINTENENACE. BLOCK REMOVED AND NEW ONES INSTALLED WITHOUT PROBLEM. BLOCKS SENT FOR TESTING & CHEMICAL ANALYSIS. HAVE ISOLATED BLOCKS TO WHAT BATCH AND POUR.