I would just hope JCW doesn't make the same mistakes again on the GE-90 V3 mold. I just think your information is wrong or 'doctored'. the number I've always heard is 13'7', but even GE's own website doesn't have anything to support that number. And you yourself have pointed out there is just a 1' difference in fan diameters and fan cowl diameters between the -90 and the -115B1 engines.
The engines are shipped from General Electric via a 747F in a transport cradle and Boeing fabricates the cowling in their factory. One of the main problems is General Electric doesn't make the fan cowl, Boeing does. Unfortunately there is not another single piece of documentation that supports your claim or your 'document', including GE's own website.
