At least 7 airframes converted for evaluation and several testing purposes. Another 20 or more as GUH-60A for ground instruction List of Operators of JUH-60A Years Model Org 1978- S-70 H-60 US Army Aviation Construction Numbers C/N Year History 70-075 78-23012,NASA-760 70-1221 88-26015 70-1289 88-26069,N483YM