As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"BLEED TRIP" OFF (LEFT SIDE) 3 TIMES/RESET EACH TIME 1. 38600 2. FL 39000 3. FL 39000. DESCENDED TO FL 33000/ NO MORE TRIPS. PERFORMED FIM TASK 36 10 10 BLEED TRIP OFF LIGHT ON PARA F STEP 1 15. FOUND BAD HIGH STAGE VALVE AND PRSOV SENSE LINE. REPLACED HIGH STAGE VALVE PER MM 36 11 06 AND REPLACED PRSOV PNEUMATIC SENSE LINE REF 20 50 11. CHECKED AND RAN LT ENG PER MM 36 10 00. ALL IS NORMAL AND NO BLEED TRIP LIGHT.