As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRUISE ALTITUDE OF 25000 FT, DENSE SMOKE THRU COCKPIT VENTS AS WELL AS CABIN. SMOKE CLEARED AT 18000 FT. FOUND NR 2 ACM SEIZED. REMOVED AND REPLACED NR 2 ACM IAW MM 21-51-03. OPS AND LEAK CHECKED GOOD. NO SMOKE NOTED. COMPLIED WITH ENGINE ODOR EVENT T/S PER ETN-EM-72-034. NO ODOR NOTICED.