Originally Posted by
nexusCFX
If I'm remembering correctly, Air Canada redid J, introduced PY, and reconfigured Y on 25 777s from Sept '15 to Jun '16, so maybe ten months. I don't think there have even been that many Polaris retrofits by this point.
In terms of retrofits, United is up to 25 aircraft in service (13 763, 12 772), plus 20 new deliveries (18 77W, 2 78J) for a total of 45 frames on property. Approximately 8 more 767/777 are in mod at the moment.
AC is actually a great example, although their full-gut retrofits were for a total of 18 777s in the span of 10 months, not in connection with major maintenance visits (unlike UA). Of the 25 777s, 2 were new-builds (coming from Boeing with the new interiors) and 5 were partial reconfigurations, removing Thompson business class seats and replacing them with the Super Diamond seat. Those 5 (2013-14 deliveries) were the first to feature 3-4-3 in Y and premium economy from the factory, so those cabins were not heavily modified.
14 of the current 76C configuration is planned to mod to the high-J 76L. When these aircraft were first retrofit in 2013-2015, they received new interiors, Y seats and IFE, all of which should substantially remain in place. I believe the 76C>76L reconfigurations will proceed at a brisk pace.