As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNDER MAIN CABIN FLOOR, LARGE SECTION OF NR 2 SYS DUCT PUSHED FWD. CAUSE UNKNOWN. FOUND BROKEN FITTING AT STA 735. REMOVED SYS 2 CLAMPS AND DUCTS. INSPECTED DUCTS AND FLANGES FOR CRACKS, FOUND TO BE SERVICEABLE. REINSTALLED DUCTS AND CLAMPS. REPLACED BROKEN FITTING. COMPLIED WITH EA 8-3610-132745 SUPPORT BRACKET AND JOINT REPLACEMENT SB DC-10-36-071. PERFORMED DUCT LEAK CHECK, NO LEAKS NOTED.