4.1.2 Periodic Tests Shall be in accordance with AMS2759. 4.1.3 Preproduction Tests Shall be in accordance with AMS2759. 4.2 Sampling and Testing 4.2.1 The processor shall use a sufficient number of specimens made from the same material and in the same heat treatment condition as the parts and processed in the same lot of parts to accomplish required testing. Parts shall be used for testing only when specified by purchaser (see Ordering Information).