What was found
ON CLIMB OUT THE RT ENG WAS ABOUT 50 DEG HOTTER THAN LT. PASSING FL 380 ENG TEMP SPIKED UP THROUGH AMBER RANGE & TO RED AT 928 DEGREES. PULLED THROTTLE BACK & ENG BACK TO NORMAL TEMP. ON DESCENT, RT ENG STARTED ABOUT 40 DEG HOTTER THAN LT FLUCTUATING 5-15 DEG UP & DOWN. REMOVED RT ENG HP SHUTOFF VALVE, INSTALLED OVERHAULED HP REG SHUTOFF VALVE. CLEANED TERMINAL STRIP AS REQUIRED. ALL WORK PERFORMED IAW MM 36-10-00,71-10-00.