As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING MAINTENANCE TO ACM, COUPLING (V-BAND CLAMP) WAS FOUND SEVERELY OVERTORQUED ALMOST TO THE POINT OF FAILURE. CLAMP WAS REPLACED USING CORRECT TORQUE, OPS CHECK GOOD. SUBMITTER RECOMMENDS MAINTENANCE PERSONNEL ADHERE TO PROPER CLAMP TORQUE PROCEDURES ESPECIALLY CLAMPS USED ON EXHAUST SYSTEMS. THIS CLAMP WAS USED ON A PRESSURIZATION DUCT AND COULD HAVE CAUSED PRESSURE LOSS HAD IT FAILED.