Arm out the Widow has the correct method.
1.2 Use of the chart
Read the chart in the direction indicated by the arrows, entering as
follows: -
-Torque -NR -Altitude
and
-O.A.T. -Ng
Follow the example to locate point "P".
Engine power is O.K. if point "P" is located in the region marked
"CORRECT"
Point "P" has no relation to the values on the upper chart other than the "CORRECT/INCORRECT" line. On other engines the limit would be TEMP but not on an Arriel as Mr Carson sez.
Some insight
here.