As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3812 UPON PARKING AT GATE WITH APU BLEED ON AND PACKS ON GOT SMOKE IN COCKPIT. CORRECTIVE ACTION: R/R RIGHT RECIRC FILTER, RAN PACKS FOR 2 HOUR ALSO RAN ENGINES WITH PACKS AND CYCLED ANTIICE AND BLEED NO SMOKE OR FUMES IN CABIN OR COCKPIT. REF B737 FIM 21-00-00-810-806, B737 AMM 21-25 AND ODI CHECKLIST. A/C OK FOR SVC. (7146421).