As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON C-CHECK LEFT PRIMARY H/E U-DUCT HAS CRACKED FLANGE. REMOVED LT PRIMARY H/E DUCT FOR SEND OUT TO REPAIR PER B-727 IAW MM 21-55-11. INSTALLED LT PRIMARY H/E DUCT PER B-727 MM 21-55-11. LEAK CHECKED GOOD LT PRIMARY H/E DUCT IAW MM 21-55-11. OPS CHECK LT PRIMARY H/E DUCT PER B-727 MM 21-55-21.