What was found
DURING FLIGHT THE NR 1 ENGINE ILLUMINATED TEN MINUTES AFTER DEPARTURE. THE NR 1 ENGINE WAS PLACED IN GROUND IDLE IAW EMERGENCY CHECK LIST AND THE FLIGHT CONTINUED. AT ARRIVAL, THE NR 1 ENGINE WAS PLACED IN FLY POSITION IAW CHECK LIST FOR NORMAL LANDING. THERE WERE NO OTHER IRREGULAR CONDITIONS NOTED DURING THE FLIGHT. MAINTENANCE DISCOVERED 1 SMALL DARK PARTICLE ON THE NR 1 ENGINE CHIP DETECTOR. PERFORMED SOA SAMPLE AND CHECKED RUNDOWN TIME OF THE ENGINE. CHIP PLUGS MUST BE PULLED AFTER LAST FLIGHT AND INSPECTED FOR A PERIOD OF 25 HOURS. (K)