What was found
CLT - FL 2127 - AT CRUISE, PRIOR TO DESCENT, THE NR 2 ENG OILPRESSURE INDICATED ZERO. ALL OTHER INDICATIONS WERE NORMAL. THE NR 2 ENGOIL PRESSURE SHOWED ZERO FOR ABOUT 60 SECONDS BEFORE IT WAS PLACED AT IDLE.THREE MINUTES LATER, SHUTDOWN THE NR 2 ENGINE FOR CAUTION REASONS. ANEMERGENCY WAS DECLARED AND THE FLIGHT LANDED SAFELY WITH NO FURTHERINCIDENT. TOTAL SINGLE ENGINE TIME WAS TWENTY-FIVE MINUTES. MAINTENANCEREPLACED THE NR 2 ENGINE OIL PRESSURE SWITCH AND OIL PRESSURE TRANSMITTER.OPS CHECK WAS NORMAL. INSPECTION OF ENGINE AFTER SHUTDOWN SHOWED NODEFECTS. ALL ENGINE PARAMETERS CHECKED NORMAL. (M)