As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE PHASE 4 INSPECTION, DISCOVERED THE DUCT ASSEMBLY HAD FAILED AND SEPARATED. THE DUCT ASSEMBLY CENTER BLEED AIR CROSS-OVER FAILED AT THE FLEX JOINT AREA WHERE WIRE MESH IS INSTALLED. (BEECHJET 400T - COMMERCIAL COUNTERPART BEECHJET 400A).