What was found
DURING FLIGHT, NR 2 OIL TEMP INDICATED 108 DEGREES C CLIMBING THROUGH 17,000' AND REACHED A HIGH OF 109 DEGREES C AFTER LEVELING OFF AT FL190. IAW CHECKLIST, THE BYPASS DOORS WERE ALREADY ON CLOSED POSITION. OIL TEMP DECREASED INTO NORMAL RANGE AFTER LEVELING OFF AT ALTITUDE. DIVERTED AND ACCOMPLISHED A NORMAL LANDING. INSPECTED NR 2 ENGINE FOR HIGH TEMP IAW MM TASK 05-11-00-992-802 & TASK 05-53-00-210-814. R & R NR 2 ENG OIL COOLER FLAP ACTUATOR IAW MM TASK 79-21-31-00-801 & TK 79-21-31-400-801. OPS CKS NORMAL IAW MM TK 79-21-31-400-801, SUB TK 79-21-31-710-002. GROUND RAN ACFT AT POWER FOR 20 MIN, OIL TEMP STAYED IN GREEN ARC. NO DEFECTS NOTED. ACFT OK FOR CONT SERVICE.