As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE DOING A PRE-TOW WALKAROUND INSPECTION, NOTICED THE FRONT ENGINE EXHAUST TAIL PIPES WERE LOOSE AND SUPPORT CLAMPS PN 15501261 BROKEN ON BOTH LT AND RT SIDES. BOTH CLAMPS HAD BOTH OUTER EARS BROKEN OFF AT WELDMENT. PREVIOUS CLAMPS FAILED AFTER EXHAUST SYSTEM OVERHAUL AFTER 191 HOURS. SUSPECT THAT FAILURES MAY BE DUE TO EXCESS VIBRATION FROM MUFFLE BALL JOINT CLAMPS INSTALLED TOO TIGHTLY. (K)