Originally Posted by
vintagepilot
I concur with the confusion about this. Having just been moved to a different service on LHR-JFK in June, everything in MMB and on Expertflyer refers to 77W, which is not mentioned in the wiki, but which appears to match the layout labelled in the wiki as 77H.
77H I'm sure is a BA internal code for the new High J configuration. The 77W is the general aircraft code for the 777-300ER. I'm sure there was a time when those internal codes showed on MMB, but I haven't seen them in a long time. For example, my next booking on BA only shows as a 777 (a 4 class 777, labelled 77R in the wiki), but my last booking on the same route which also was shown as a 777 but it was a different configuration (a 3 class 777, labelled 77S in the wiki). So MMB only seems to be showing the aircraft type and not the configuration code listed in the wiki.