I managed to get the sump and the gearbox off today. For some reason they were much easier. I gave the sump one good whack with the dead blow hammer and it came right off. The accessory gearbox cover took a bit more doing. I was able to get some plastic putty knives started in the gap between the cover and the crankcase and I worked them around the edges until it was free.
Everything in the gearbox looks pretty good. It’ll all have to be properly inspected but there doesn’t seem to be any backlash or galling to speak of on any of these parts. There is no corrosion on anything in the gearbox.
