What was found
BNA - FLT 406 - DURING FLT, THE RT ENG OIL LIGHT CAME ON, ENG OIL PRESS FELL TO ZERO. THE RT ENG WAS SHUT DOWN. THE AC RETURNED TO BNA AND LANDED WITHOUT INCIDENT. INSP REVEALED ENG OIL TANK WAS EMPTY. NO EVIDENCE OF LEAKAGE NOTED. THE REAR TURBINE BEARING HOUSING AND RT FLAP EXH TRAIL SHOWED EVIDENCE OF BURNED OIL. THE ENG WAS REMOVED AND SHIPPED TO ALLIED SIGNAL FOR INVEST. THE RT ENG WAS R/R. THE TEARDOWN REPORT STATES, RT ENG FAILED AS A RESULT OF FOD DAMAGE TO THE TURBINE OIL SCAVENGE PUMP. DEFECTIVE PARTS WERE REPLACED AND THE ENGINE WAS RETURNED TO SERVICE.