tcasblue's post above covers that. The N1 indicates whichever way the rotation is! Even if the sense is wrong. With a warm engine it is not unusual to see the EGT increasing initially with N2 rotation by the starter as the correct direction of airflow through the engine is started - this is in contrast to the usual indication of decreasing EGT with N2 spinup.
Note - this applies to the CFM56
Last edited by Meikleour; 21st March 2020 at 17:04.
Reason: note added