As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING L PACK AUTO FAIL MSG APPEARED FOLLOWED QRH THEN RECEIVED L PACK TEMP CAUTION MSG. SHUT OFF PACK W\ QRH. MAX TEMP 99 C. DEFERRED LH PACK. R/R LH AIR CYCLE MACHINE IAW CRJ 900 AMM 21-51-08-000/400-801 OPS CHECK LEAK CHECK GOOD THIS CLEARS MEL