In the final report on the February 2005 Cessna Citation 560 crash in Pueblo, Colo., the NTSB said it interviewed instructors about pilot training on Citation 560 de-icing procedures. The Citation 560 AFM recommends that pilots wait to activate de-ice boots until one-quarter to half an inch of ice accumulates to prevent so-called ice bridging. During approach, however, when ice is present on the wings, “regardless of thickness,” the 560 AFM tells pilots to increase speed and “activate the surface de-ice system.” An NTSB review of CAE SimuFlite’s training syllabus, the Board stated, “revealed that no specific instruction exists to evaluate a pilot’s performance of the AFM procedures to increase the airspeed and operate the de-ice boots during approaches when ice is present on the wings. Further, one of the SimuFlite Cessna 560 instructors was unaware of these AFM procedures.” The 560 syllabus from “another major training center,” the NTSB noted, “contained no instruction to ensure that the instructors are evaluating the procedures.” SimuFlite was identified by the NTSB as the training organization for the pilots of the Circuit City aircraft that crashed. Asked whether Cessna has asked the training companies to clarify the 560 icing syllabus, a Cessna spokesman told AIN, “This has now become a matter of discussion between the NTSB and FAA. As such, we have no public comment at this time.”