As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AIRCRAFT RETURNED TO LIT DUE TO ON CLIMBOUT 10-11K FUMES APPEARED. MAINTENANCE ACCOMPLISHED DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM PER TASK CARD 26L0021013 AND REPLACED THE RECIRCULATION AIR FILTERS PER AMM 21-21-41. NO ADDITIONAL ODORS WERE NOTED.