Can't remember which of those years but the game was at the Rockpile, frozen field, and the BILLS hired a helo from Prior Aviation, to descend over the frozen field, and fly over trying to thaw the field. Don't think that worked very well, because they didn't clean away the straw layer, that was already there, and the downdraft from the rotors threw the straw all over the stadium, Jefferson & Northhampton streets too.
Can't find any story from the News archive but I do remember the pic of the Bell helicopter flying about 20' above the playing field surface. Maybe it was from the Courier Express?