Sounds like its dead, but without a photo or two, hard to say for sure.

Check the twigs to make sure that they are still moist, and still show a bit of green when the bark is nicked. If not, put a little nick on the bark of the trunk, to see if it shows the same. If that doesn't work, the prospects are not good: the growth is likely to be coming from below the graft, and is not likely to produce fruit worth eating. Do you know what happened to it, Mcoughlan?