Some advice for the STC ‘s and trainers that dealt with this individual . Download and keep your training reports on file , because if something goes wrong the CAD will investigate and I suspect that your reports will be magically sanitised . You may well need the originals at an investigation inquiry .
This transfer from one type to another has been going on for some time now . Can’t fly one type , try another ,usually from the 747 to the Bus , unless of course the individual had upset someone in the office in which case it was sayonara
Having flown both Boeing types, a two engine approach on the jumbo is more challenging than an engine inop approach on the 777 but neither is beyond the capabilities of any good pilot. Some are better than others as in everything in life