As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LEFT BLEED DUCT WARNING IN FL240. BOTH BLEEDS AUTOMATICALLY OFF. PROCEDURE ACC QRH. CAB DECOMPRESSION, PAX-O-MASKS RELEASED, CAB-ALT AT 17,000 FT. CREW O USED ALL RELATED BLEED LOOP DETECTION SENSING ELEMENTS TO BE REPLACED. UNDER INVESTIGATION.