As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING THERE WAS A HAZE IN THE CABIN AND COCKPIT. TAXIING TO THE RAMP WE GOT A L PACK FAIL CAS. BLACK FILM COATING EVERYTHING IN THE CABIN. REMOVED LEFT ACM AND INSTALLED REPAIRED LISTED BELOW I/A/W AMM 21-52-03. LEAK AND OPERATIONAL CHECKS SATISFACTORY. NO HAZE OR ODOR WAS NOTED IN CABIN OR COCKPIT DURING OPERATION OF ACM.