80--SEALER,SURFACE

904-5000. " This part requires engineering source approval by the design control activity in order to maintain the quality of the part. Existing unique designcapability, engineering skills, and manufacturing/repair knowledge by the qualified source(s) require acquisition/repair of the part from the

approvedsource(s). The approved source(s) retain data rights, manufacturing/repair knowledge, or technical data that are not economically available to the Government, and the data or knowledge is essential to maintaining the quality of the