As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A FLIGHT, THE CREW REPORTED IN FL170 A BLEED LOOP C, FOLLOWED BY BLEED DUCT WARNING. THE 2 PRSOV CLOSED AND THE OXYGEN MASK DEPLOYED. THE RT BLEED LOOP A DETECTED A LEAK. THE RT BLEED LOOP B WAS INOPERATIVE BECAUSE OPEN. A SINGLE LOOP DETECTION IS MORE SENSITIVE AND RESTRICTIVE THAN A DUAL LOOP DETECTION SYSTEM.