What was found
RNO TO YKM - CREW REPORTED STRONG SULPHURIC SMELL COMING OUT OF THE VENTS ON CLIMB-OUT. AIRCRAFT RETURNED TO RNO WHERE CREW REPORTED RUBBER/ACRID SMELL ON FINAL DESCEND. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND DIRTY COALESCER BAGS, MAINTENANCE REMOVED AND REPLACED COALESCER BAGS IAW MM 21-20-02. PERFORMED HIGH POWER RUNS AND COULD NOT DUPLICATE SMELL. AIRCRAFT RETURNED TO SERVICE.