What was found
AT 5000' ON FINAL APPROACH, DIRTY SOCKS SMELL IN COCKPIT PACK 1 OF SMELL WENT AWAY 2 MIN LATER AT 3000' FA CALLS WITH DIRTY SOCKS SMELL IN AFT CABIN PACK 2 SELECTED OFF SMELL WENT AWAY-REF LP 3066621-2 FOR APU R/R. PERFORMED DECONTAMINATION OF PACK 1 +PACK 2 WITH APU AND ENGINES IAW AMM 21-00-00-. NO SMELLS NOTED. CLEANED A/C BELLY, GEAR DOORS, KNEEL BEAMIAW AMM 12-21-11. R/R A/C RECIRULATION FILTERS 4012HM, 4013HM IAW AMM 21-21-41. NO LEAKS FROM ENGINES. A/C OK FOR SERVICE.