Actually it was the elevators that had the icing problems. The wing problem was during over MMO limit the ailerons would start fluttering and remove itself and the wing, which would tend to put an instant end to the flight.
Another problem was that when the wing spoilers were deployed it caused a nose tucking action and the airplane would actually accelerate causing more problems. The fix was to train that in an over MMO emergency situation to lower the landing gear, the gear doors would depart the airframe, but the wings wouldn’t.
This on the early 23/24/25 series Lears, starting with the 30 series the spoilers were relocated and were tied into the ailerons and the problem was solved.