From what I can remember, the wiffle tree on the 1-11 was a part of the rudder feel system and was inclined to topple during taxying. A mod was introduced later to inhibit the fail light unless the wiffle tree had toppled for more than five seconds.
Ahhhhhhhh! the ol' one-eleven (descends into a bout of nostalgia, remembering the pink airplanes in the mid seventies)