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This D1-4426 web site specifies how The Boeing Company assures that special processes, production of raw material and the procurement of selected part standards are performed in accordance with contractually established engineering specifications, drawings and quality requirements.

Important Note: Any reference to Boeing includes all Divisions listed in the "Division Tables" (use the D1-4426 left hand menu for a list) except where a limitation is noted.

TO NAVIGATE THE D1-4426 DOCUMENT: Use the left menu to access all document sections below the heading: Approved Process Sources D1-4426

Frequently Asked Questions

The following links are provided for reference only to determine specification revision level and departure information for certain specifications. These links could contain specifications not in the D1-4426 Specification Index Listing. (Revision information only - not a link to access copies of the specifications)