As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LEFT ENGINE BLEED AMBER CAS MESSAGE AT FL 300. CREW RAN QRH (QUICK REFERENCE HANDBOOK) AND RETURNED TO FIELD. MAINTENANCE INSPECTED AND FOUND LEFT PACK SUPPLY DUCT LEAKING. MAINTENANCE REMOVED CLAMPS, ADJUSTED SUPPLY DUCTING, RE-INSTALLED CLAMPS AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.