As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE BLEED WARNING MESSAGE. REMOVED AND REPLACED THE SEAL AT CONNECTION OF THE REAR LT PACK TEMP CONTROL VALVE DUCT IAW AMM. SECURED THE BOOT ON HOT AIR SHUT OFF VALVE IAW AMM. RAN LEFT PACK NO LEAKS OR INDICATIONS. OPS CHECKED GOOD.