As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE ENGINE OIL FILTER WAS REMOVED FOR CLEANING AND INSPECTION. WHILE THE ENGINEER WAS INSPECTING HE NOTICED THAT THE FILTER WAS LABELED INCORRECTLY. IT HAD "THIS END OUT" ON BOTH ENDS OF THE FILTER. THE FILTER HAD BEEN INSTALLED CORRECTLY HOWEVER WITH THAT LABELING SOMEONE WHO DID NOT REALIZE COULD INSTALL THE FILTER BACKWARDS. (TC NR 20090113002)