What was found
(AIRCRAFT GROUNDED) (EMERGENCY DECLARED) DIRTY SOCK SMELL ON CLIMB STRONG ODOR. APU OFF BLEEDS ON BOTH PACKS ON. ODOR BEGAN IN CABIN / REMOVED AND REPLACED RECIRCULATION FILTERS 4012HM AND 4013HM PER AMM 21-21-41-000-001-A AND 21-21-41-400-001-A. OIL FOUND IN R/H PACK REHEATER, ACCOMPLISHED BLACK LIGHT INSPECTION ON MAIN HEAT EXCHANGER, PRIMARY HEAT EXCHANGER, ACM, AND PLENUM, NO FURTHER CONTAMINATION FOUND, WORK PERFORMED AS REQUIRED PER TC 21-000-004.