For many years, aerospace and defense related military or government contracts required NDT personnel qualifications in accordance with MIL-STD-410E. It was replaced in the 1990’s by NAS 410.

Many companies are currently using the January, 1996 revision 1; however, Revision 2 was published in February, 2003 and introduced significant change in the training of Liquid Penetrant Testing and Magnetic Particle Testing personnel. Training for each of these methods was increased to 16 hours each for Level I and Level II for a total of 32 hours for Level 2 qualification.

Note: Revision 2 also changed the re-certification period for Level I and II from 3 years to 5 years.