ASSUMED TEMPERATURE REDUCED THRUST
Regulations permit the use of up 25% takeoff thrust reduction for operation with assumed temperature reduced thrust. Use of reduced thrust is not allowed on runways contaminated with water, ice, slush or snow. Use of assumed temperature reduced thrust is not recommended if potential windshear conditions exist.
Enter the minimum assumed temperature table with airport pressure altitude and read minimum assumed temperature. If assumed temperature is below this valve, use the takeoff %N1 table to set takeoff thrust. To find assumed temperature reduced thrust, obtain the assumed temperature %N1 by entering the assumed temperature limit %N1 table with actual airport temperature and assumed temperature if operating with packs off apply the bleed adjustment shown in %N1 adjustments for engine bleeds table. Apply the altitude adjustment shown in the %N1 altitude adjustment table. Check the resulting value by entering the minimum assumed temperature limit %N1 table with actual airport temperature and pressure altitude. Use the greater of assumed temperature limit %N1 or minimum %N1 as the assumed temperature reduced thrust %N1 determine takeoff speeds using the actual takeoff weight and assumed temperature.
