As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HAZE/SMOKE IN CABIN ON INSPECTION RT PACK 120C. UNABLE TO COOL IN MANUAL OR AUTO MODE. LT PACK IS OPERATING NORMALLY. BOTH PACKS WERE RUNNING OFF OF APU AIR. ***AIRCRAFT REMOVED FROM SERVICE*** REF WO 310433 WC 3,4,5 FOR R&R OF LH ACM IN COMPLIANCE OF AWA SUP 09-037D OPS CHECKS GOOD