B737-800 maximum rated thrust and maximum certified thrust
 

Question :

B737-800 FCOM say that the full rated takeoff thrust for the installed engine is available at a thrust lever position less than the forward stop, the maximum rated thrust is available at the forward stop and the EEC limits the maximum thrust according to the airplane model as follows:

737-800 : cfm56-7b27 rating.

However, any web site(www.b737.org.uk) say that the maximum rated thrust is available at a thrust lever position less than the forward stop, the maximum certified thrust is available at the forward stop and the EEC limits the maximum certified thrust according to the airplane model as follows :

737-800 : cfm56-7b27 rating.

I am very confused regarding differences and would like to know which one is correct.

Is the maximum rated thrust the maximum certified thrust?? OR
Is the full rated takeoff thrust the maximum rated thurst??

Boeing changes the wording in the manuals from time to time to reduce possible confusion and ambiguity. The websites can't be relied on to be updated to reflect the latest terminology. Go by only what is in the latest FCOM.

This can be complicated due to wroding in the FCTM and Systems Manuals, but I would suggest you first read the section on fixed derates and assumed temp derates. There was a good thread on this subject a few months ago, pretty much exhausted the topic.