As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L BLEED DUCT MASTER WARNING WITH CABIN PRESSURE DROP. INSPECTED AN FOUND BLEED DUCTS CRACKED AT THE RH PACK PRECOOLER BYPASS DUCT AND THE BLEED AIR CROSSOVER DUCT, BLOWING HOT AIR ONTO THE LEFT SIDE BLEED LOOPS. REF. LOG PAGE 581053 DISCREPANCY 1 AND DISCREPANCY 2.