What was found
DLH - INBOUND TO DLH, CREW EXPERIENCED THE RT ENGINE OIL PRESSURE FLUCTUATION BETWEEN 40-100 PSI ACCOMPANIED BY THE ILLUMINATION OF THE RT OIL PRESSURE ANNUNCIATOR. THE RT ENGINE WAS SECURED AFTER WHICH AN UNEVENTFUL LANDING WAS COMPLETED. MAINTENANCE INSPECTED FOR OIL LEAKS, SERVICED OIL LEVEL, AND MADE SEVERAL ENGINE RUNS, BUT COULD NOT DUPLICATE THE FLUCTUATION.