As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE TURBO HEAT SHIELD CHAFED 30 PERCENT THROUGH THE LT INDUCTION ELBOW DUE TO ENGINE VIBRATION. STRICT ATTENTION SHOULD BE PAID TO THE AFT IB SIDE OF HEAT SHIELD. THE HEAT SHIELD HAD TO BE ALTERED TO PREVENT FURTHER REOCCURRENCE OF THIS SITUATION.