What was found
FA ADVISED OF BURNING OIL SMELL FROM BLEED SYSTEM DURING DESCENT. REMOVED FROM SERVICE. CREW STATED SMELL WAS BRIEF DURING DESCENT. C/W FIM MCN 62172-01 ISSUE 2 STEP 2. FORM M-744 COMPLETED BY FLIGHT CREW. C/W FAULT ISOLATION PROCEDURE PER FIM TASK 71-00-00-810-817. PERFORMED GVI OF THE ENGINES, NO EVIDENCE OF OIL LEAK NOTED. CHECK ENGINES OIL LEVEL, CHECKED GOOD. RAN ENGINES AT DIFFERENT POWER SETTINGS WITH DIFFERENT BLEED SCENARIOS, NO BURNING SMELL NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.