What was found
(CAN) ON DEPARTURE, ACFT YAWED TO THE LT, NUMBER 1 SIDE, CREW ELECTED TO LEAVE GEAR DOWN AS THEY THOUGHT POSSIBLE BLOWN TIRE. ATC HAD THEM CLIMB TO 7000FT, AT THAT TIME THE NR 1 ENGINE HAD HIGH OIL TEMP 180C. THE CREW THEN ELECTED TO RETURN. WITH THE TEMP THAT HIGH, THE CREW ELECTED TO BRING ENGINE BACK TO FLIGHT IDLE. A PAN PAN WAS DECLARED. FLIGHT LANDED ON RWY AND STOP FOR INSPECTION BY CFR. CLEARED TO GO AND TAXIED ON OWN POWER TO GATE. NR 1 ENGINE OIL LEVEL/TEMP SENSOR REPLACED SERVICE IAW AMM 79-31-01PB401. PN ON-OFF 2160M12P03, W5 ENGINE HARNESS REPLACED. PN ON-OFF 99207S0CN4120T19. HIGH PWR RUN CARRIED OUT, MAX OIL TEMP RECORDED - 90` AT T/O POWER ON 3 SEPERATE RUNS. CONSIDERED SERVICEABLE.