As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, COCKPIT FILLED WITH CONDENSATION FOG AND ACRID ODOR. CONDENSATION AND ODOR DISAPPEARED WHEN PACK NR 1 WAS TURNED OFF. FOG WAS BAD ENOUGH COCKPIT VISIBILITY WAS GREATLY REDUCED. DEFERRED NR 1 AIR CONDITIONING PACK AS PER MEL 21-51-01, DMI 15439 ASSIGNED CAT-C. PLACARD INSTALLED. CHECKED AND FOUND WATER SEPARATOR COALESCENT BAG INSTALLED INCORRECTLY. INSTALLED CORRECTLY PER M/M 21-51-16, OPS CHECKED NORMAL. THIS CLEARS DMI #15439.