As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LP1211090 -- ODOR EVENT TWICE DURING FLIGHT . FIRST AT CRUISE FL390 LASTED JUST ONE MINUTE BEFORE DISSIPATING. THEN AGAIN ON DESCENT THROUGH 12,000FT MORE IN THE AFT CABIN ON DESCENT . THROUGH ENTIRE AC AT CRUISE BUT MORE TOWARD AFT CABIN ON DESCENT. OILY MUSTY SMELL. CORRECTIVE ACTION --- PLACED ON TDI 1156430 FO 60 FLT CYCLES DUE DATE 11-09-2019 REF EA# A0-21T-34386.