Plane with sick passengers had air contamination before

Plane with sick passengers had air contamination before
http://www.wcnc.com/home/Plane-with-sick-passengers-had-toxic-fume-incident-before-82127832.html#

"The US Airways Boeing 767 plane where 15 people got sick Jan. 16 had been taken out of service twice in recent weeks for a foul odor."