On the 727 and 737-200 we used to always crosscheck the N1 and had a pre-calculated minimum value to be reached which was written down on the Takeoff data card.
The call made was "Takeoff thrust set-N1 checks". Something to consider doing, especially on the shorter or field limited runways with JT-8D engines.
Last edited by JammedStab; 21st Jan 2018 at 21:02.