NAS
410
National
Aerospace Standard
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.
Initially published in May, 1996.
Revision 1 was issued in June, 2002; Revision 2 was issued in
February, 2003 introducing 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 1 and Level 2 for a total of 32 hours for
Level 2 qualification. Additionally, Revision 2 changed the
re-certification period for Level 1 and 2 from three (3) years to
five (5) years intervals.
NAS 410 Revision 3 (current
version) completely revised the standard in March, 2008 and is
considered technically equivalent to the European standard EN 4179
entitled Qualification and Approval of Personnel for Non-destructive
Testing. Table 1 and Table 2 provide training and experience
requirements for Level 1 & 2 personnel.
Table 1 - Minimum Formal Training Hours, Level 1 and 2
Method |
Level 1 |
Level 2 with Level 1 certification |
Level 2 without Level 1 certification |
| Eddy Current (ET) |
40 |
40 |
80 |
| Liquid Penetrant (PT) |
16 |
16 |
32 |
| Magnetic Particle (MT) |
16 |
16 |
32 |
| Radiography (RT) |
40 |
40 |
80 |
| Ultrasonics (UT) |
40 |
40 |
80 |
Table 2 - Minimum Experience Requirements, Level 1 and 2
Method |
Level 1 (Trainee experience) |
Level 2 with previous Level 1 certification |
Level 2 without prevous Level 1 certification |
| Eddy Current (ET) |
400 |
1200 |
1600 |
| Liquid Penetrant (PT) |
130 |
270 |
400 |
| Magnetic Particle (MT) |
130 |
400 |
530 |
| Radiography (RT) |
400 |
1200 |
1600 |
| Ultrasonics (UT) |
400 |
1200 |
1600 |
