A320 contaminated cabin air
We have had this problem on our A320 fleet for year, coming and going. Some times the "old socks" smell, other times a "chemical" smell. It appears almost always during descent, around 10-15000 ft, often starting in the rear cabin.
Most times maintenance finds a oil or hydraulic leak at the aft underside of the fuselage, and says these fluids enter the APU air inlet, and then then the aircondition.
Our company says engine oil is NOT harmful, but only hydraulic fluids in aircond. system is harmful ?
Other out there with contaminated cabin air experience on the A320 ?