Doubt on 737NG: N1 Red and ECC norm/altn modes
Good day everyone!
Studying for a Type Rating I have some doubts about this topic.
The OM says that:
--> "The N1 Red Line indicates the N1% RPM operating limit"
--> "The EEC provides N1 and N2 redline overspeed protection in both normal and alternate modes."
The question is: if the EEC operates in ALTN mode, why does the N1 become RED if I put the throttles full forward? Doesn't the EEC protect against overspeed in both normal and alternates modes?
The only explanation is that the N1 Red Line does not indicate the maximum number of RPM, but the Maximum Certified Thrust which then yes, in ALTN can be exceeded... yet the OM says "N1 RPM operating limit".
What am I doing wrong?
Thank you very much for your time and support!
Ciao
Teo