58--BLANKER,INTERFERENC, IN REPAIR/MODIFICATION OF

pability, engineering skills, and manufacturing/repair knowledge by the qualified source(s) require acquisition/repair of the part from the approved source(s). The approved source(s) retain data rights,manufacturing/repair knowledge, or technical data that are not economically available to the Gover

nment, and the data or knowledge is essential to maintaining the quality of the part. An alternate source must qualify in accordance with the design control activity's procedures, as approved by the cognizant Government engineering activity