As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED AFTER TAKE OFF DUE TO SGNIFICANT FUMES IN CABIN PERFORMED SMOKE/ODOR CONDITIONAL INSPECTION IAW AMM 05-51-26-800-801C1 THROUGH STEP C FOR AIR RETURN. RAN BOTH ENGINES FOR MINIMUN OF 10MINS AT PART POWER WITH PACKS AND NO SMOKE/ODOR WAS EVIDENT. SUSPECT RESIDUAL CONTAMINATION FROM #2 ENG COMPRESSOR WASH. FOB 22,100, REMAINING AFTER RUN 20,000. OK ADD EMP:U075618 TO CONTINUE.