| Specification | Process Description | Category | Limits |
| AMS 2631 | Ultrasonic Inspection Titanium and Titanium Alloy Bar and Relief *NOTE* NGAS ASPL approval is required when testing is performed by a secondary source other than the primary mill. | Non-Destructive Testing | Limits: None |
| AMS-STD-2154 | Inspection, Ultrasonic, Wrought Metals, Process for *NOTE* NGAS ASPL approval is required when testing is performed by a secondary source other than the primary mill. | Non-Destructive Testing | Limits: None |