"that they ant not that happy with the 764s and those options would go to the 772."
I believe CO
did convert "some" original orders for 767-400s to 777s, but I think only about four and this was about 3-4 years ago. Originally CO
ordered 24 767-400s, Im not sure how many they have today.
I believe they switched the 767-400 to 777 orders because of the launch of the Hong Kong flight and the success of the Tel Aviv flight, btw I think CO
still has a couple of options for both the 767-200 and 777 but no more 767-400 options.