N1 - 0, N2 - 0 (737 argument with an instructor)

[sheppey]

But after that, I was interrupted by the instructor – stating that he gave me a simple engine failure.

Well there you are then. What's all the hue and fuss about?

Regardlees what the N1 and N2 readings were (either instantaneously or some time later), if we are to believe the OP username Emirares787 when he writes that the instructor told him he had given him a simple engine faillure, then readers of this saga must accept the instructor did just that. Even the copilot diagnosed an engine failure. The PF obviously disagreed with the copilot assessment. Fine - that is his privilege.