What was found
CRP - FLT 3642 - AT AN ALTITUDE OF APPROXIMATELY 10,000 FEET, THE RIGHT ENGINE OIL PRESSURE BEGAN TO DROP FOLLOWED BY THE ASSOCIATED OIL PRESSURE CAP ADVISTORY. WHILE THE CREW WAS C/W THE QRH, THE ENGINE SHUT DOWN UNCOMMANDED. FLIGHT ATTENDANT REPORTED SMOKE WITHIN THE AIRCRAFT CABIN. REMOVED AND REPLACED THE RIGHT ENGINE ASSEMBLY IAW ATR JIC WC 05006-CS-20000-001. AIRCRAFT WAS RETURNED TO SERVICE. PART TOTAL CYCLES: 9,156. (X)