As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#603, JFK-YVR. 'DIRTY SOCK ODOR REPORTED BY FLIGHT ATTENDANTS WHILE DESCENDING THROUGH 4000'. SLIGHT ODOR IN COCKPIT. WAS WORSE IN REAR OF AC; COMPLY WITH INFORMATION NOTICE 2017-T015 COME UP SECTION A. ISOLATED FAULT TYPE 10 A/C PER CFM 05-15-00-810-085-B AND TSM 05-15-00-810-085D. AIRCRAFT IS OK FOR SERVICE.'