The FAA published a final rule June 6 to the proposed airworthiness directive affecting certain NavWorx Inc. universal access transceivers (UATs). While the FAA is prohibiting use of the WAAS GPS position source built into the affected UATs, the agency is giving affected aircraft owners more than seven months to determine their best course of action before the units must be removed from the aircraft or disabled.
Source: aopaFAA bars NavWorx position source