Report 767 TOPER is always calculates 70C (SEL TEMP) in Nikola Jovanovic Support Forum Posted Sunday at 06:10 PM On 4/12/2021 at 5:03 PM, pizzafly said: Hello, I saw your comment above regarding derate. I don't see a derate option in my 767 tool v188.8.131.52. Is there a way of combining a TO-1 derate with an assumed temperature? Sorry that was my bad, TOPER 767 has no de-rate option at the moment. 70 deg is the maximum sel temp and this means that your airplane is usually very light and the airfield is long. You can try using a lower flap setting.