What was found
FLT#88, FLL-ALB. 'DURING DESCENT PASSING 11000 FT (DIRTY SOCK) PRESENT IN COCKPIT ( PACKS ); PERFORMED LEVEL C REMOVAL OF THE CONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM IAW AMM 21-00-00-615-804A. REMOVED AND REPLACED RECIRCULATION FILTERS IAW AMM 21-21-41. REMOVED AND REPLACED PACK 2 OZONE FILTER IAW AMM 21-51-41. NO ODOR WAS NOTED. MX-4 UPDATED. PLACARD REMOVED. REF LP 3704677-1 (REMOVED AND REPLACED OZONE FILTER FOR PACK 1 IAW AMM 21-51-41-000-001-A ) FOR CONTINUATION.'