As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOWER MOTOR MOUNT 'V' AT MIDDLE ATTACH FITTING WAS FOUND CHAFED COMPLETELY THROUGH THE WALL OF TUBING (APPROXIMATELY 20 PERCENT OF DIAMETER OF TUBE) BY P/N 920029-01 FLEX DUCT. SUBMITTER STATED THIS PROBLEM IS REPEATEDLY SEEN ON ALL MODEL AEROSTAR. RECOMMEND THOROUGH INSPECTION OF AREA.