Direct Answer
The S400 approval is an independent international laboratory qualification from GE Aerospace that permits a facility to conduct a broad spectrum of chemical, mechanical, and metallurgical testing on aerospace materials
The approval has the following structural impact on the Indian aerospace supply chain:
| Certified Entity | Mishra Dhatu Nigam Limited (MIDHANI) |
| Certification | GE Aerospace S400 Lab Approval |
| Significance | First Indian company to achieve this certification, reducing reliance on foreign testing labs |
| Scope | Chemical, mechanical, and metallurgical testing of specialized metallic materials |