Originally Posted by cjude1962

I think that heavy maintenance checks are being done in conjunction with the cabin mods on some of the aircraft - at least I think that was the case with 628 and it seems 631 as well, judging by how long it has taken. It will be interesting to see how long the cabin mods take on 928, which is not due for a heavy check, being so new - that should give us some idea how long the cabin mods will take on aircraft not scheduled for a heavy maintenance visit.