As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2166 BURNING OIL SMELL REPORTED IN CABIN BY TWO CREW MEMBERS DURING DESCENT. NO VISIBLE SMOKE REPORTED. ALL INDICATIONS IN COCKPIT NORMAL. REPLACED NR 1 AND NR 2 ENGINE P2.5/P3 SWITCHING VALVE PER P&W MM 72-30-00. GROUND RAN AIRCRAFT AT VARIOUS POWER SETTINGS. NO DEFECTS NOTED AIRCRAFT RETURNED TO SERVICE.