Recently I looked at a Cessna 336 near me and for the life of me I could not find the factory installed data plate for the airframe. It may be covered up by upholstery or stick-on insulation. I found the "Trim & Finish" plate on the cabin door forward door post. A search of the front door post and the two main ring bulkheads behind the pilot's seat did not reveal the data plate either. Anyone have any idea where Cessna may have put it?