As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LH ENG BLEED OFF CAUTION MESSAGE INTMT. REMOVED & REPLACED #1 ENG PRESSURE REGULATING & SHUTOFF VALVE IAW AMM 36-11-09. U026317 U246260. U070317 PERFORMED LOW IDLE RUN & HIGH POWER RUN ON #1 ENG, PERFORMED LEAK AND OPS CHK GOOD IAW AMM 36-11-09/201.