As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LOWER DUCT FROM THE HEAT EXCHANGER TO THE ACM HAS A CRACK APPROX 1.5 INCH LONG. REMOVED DUCT ASSY AS REQUIRED REF A300-600 AMM 21-51-32. PERFORMED WELD REPAIR REF DRM, PARA 4-C. ACCOMPLISHED FPI REF NTM 51-90-00 PT9 PER EA 6-2150-127942 "AIR CONDITIONING, LT PACK DUCT CRACK". NO CRACKS NOTED. REINSTALLED DUCT REF AMM 21-51-32. PERFORMED LEAK CHECK REF AMM 21-51-00. LEAK CHECK GOOD.