What was found
DURING CRUISE AT FL330, NOTICED A METALLIC BURNING ODOR. DONNED MASKS AND FOLLOWED QRH FOR FIRE SMOKE OR FUMES CHECKLIST. COCKPIT FILLED WITH A GREY HAZY SMOKE. SMOKE AND FUMES LASTED FOR LESS THAN TWO MINUTES. DIVERTED, AND COMPLIED WITH ALL STEPS OF TSI 21-54/5470. RAN ENGINES AND A/C PACKS FOR 20 MINUTES. NO ODOR PRESENT AT ANY TIME. THE COALESCER BAGS WERE DIRTY WITH NO ODOR AND WERE REPLACED. RAN ENGINES IAW JRH.