As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUME EVENT AFTER FOLLOWING QRM WE WERE ABLE TO ISOLATE, POSSIBLE PACK 1. *SEE NK AIR QUALITY REPORTING FORM.-PERFORMED TSM 05-50-00-810-831-A. NO ODOR DETECTED AT THIS TIME. AS A PRECAUTIONARY, R&R'D CABIN RE-CIRC. FILTERS IAW AMM 21-21-41. NO DEFECTS NOTED AT THIS TIME. A/C IS OKAY FOR CONTINUED SERVICE.