As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L BLEED DUCT WARNING MSG IN FLIGHT RUN QRH, REMOVED AND REPLACED THE BLEED-AIR CROSSOVER DUCT IAW CRJ 900 AMM 36-19-09-000/400-801-A04. PERFORMED LEAK TEST OF THE BLEED-AIR DISTRIBUTION SYSTEM IAW CRJ 900 AMM 36-10-00-790-801. OPS CHECK GOOD AT THIS TIME.