As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE BLEED OFF, ADVISORY MESSAGE DISPLAYED DURING DESCENT ON SEVERAL OCCASIONS. PERFORMED FIM 36-10 FAULT TREE 838. HPSOV AND PRV PFM THUMB TEST. TESTED OK. CHECKED LINE AND FITTINGS, NONE LOOSE OR DAMAGED. PFM ENGINE RUN CHECKED. NO FAULTS FOUND.