As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS LEFT BLEED LIGHT ILLUMINATED WITH DUCT PRESS ZERO AND VALVE LIGHT ON. CYCLED CB S11, NO HELP. TURN ON ANTI-ICE TO CHECK PRV, NO NOTICEABLE RISE IN EGT AS COMPARED TO RT ENG. REPLACED NR 1 ENGINE PRV AND PRVC REF AMM 36-11-19 AND AMM 36-11-18. RAN ENGINE, ALL OPS CHECKS GOOD.