I seem to recall reading a story, although I can't find it at the moment, that 2 or 3 of the HHP's had been fixed and returned to service.
I can tell you from personal observations that there was a HHP sitting in NY's Sunnyside yard on Thursday at the head of a consist. Since I was moving overhead on the #7 Subway line, I can't tell you if it actually left the yard pulling that train.