As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE BLEED TRIPPED OFF AROUND 20000 FT, COULD NOT RESET. ENG DUCT PRESS WAS SPLIT L-15 AND R-40 PSI ON CLIMBOUT. T/S PER FIM. REPLACED PRECOOLER CTL VLV AND PRSOV PER MM. REPLACED REDUCER FOR BLEED AIR REG SUPPLY LINE. ALL LEAK CHECK GOOD. RAN ENG PER PFHB. PNEU SYS CKS GOOD.