Boeing Forging Supplier from India: AS9100D for Commercial and Defence

August 2, 2026


Boeing’s commercial aircraft programmes 737 MAX, 787, 777X – and defence programmes F-15EX, KC-46A, P-8 Poseidon – consume thousands of forged titanium, aluminium, and alloy steel structural components annually. Indian AS9100D certified forging manufacturers with Boeing production history, AS9102 FAIR capability, and AMS material specification compliance are positioned to supply Boeing programmes through Boeing’s tier-1 supply chain.


Programme		ForgingMaterialAMS Spec
737 MAX structuralWing rib fittings, floor beam7075-T73 AlAMS 4045
787 DreamlinerEngine mount fittings, framesTi-6Al-4VAMS 4928/4935
777XWing attachment fittings7050-T7452AMS 4108
F-15EXStructural bulkheadsTi-6Al-4V, 300MAMS 4928, 6257

Boeing’s approved supplier qualification (D1-4426) imposes specific requirements on forging suppliers beyond AS9100D. The Boeing Qualified Products List (QPL) for titanium billet (AMS 4928) limits approved raw material mills. Boeing’s Production Approval requires a Boeing SQR (Supplier Quality Representative) on-site assessment before first production.

Boeing-specific requirements: AMS 4928 billet from Boeing QPL-approved mills only; D1-4426 special process compliance — NADCAP for heat treatment and NDT on primary structure; AS9102 FAIR for every new part number with Boeing quality engineers reviewing all 21 forms.

Practical access pathway: Most Indian forging manufacturers access Boeing commercial programmes through Boeing’s established US tier-1 machining and fabrication companies. Tier-1 direct Boeing qualification takes 18–30 months; tier-1 supplier pathway takes 12–18 months.

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Vinir Engineering’s Capability

  1. AS9100D full scope, OASIS verifiable
  2. 7075-T6/T73 and 7050-T7452 aluminium forgings under AMS 2770 heat treatment.
  3. Ti-6Al-4V closed die forgings with alpha case control per AMS 2801.
  4. AS9102 FAIR experience for aerospace OEM customers.
  5. AMS 2750-calibrated furnaces.
  6. NABL-accredited testing.


Frequently Asked Questions

1.What is Boeing D1-4426 and how does it affect Indian forging suppliers?+–
Boeing D1-4426 (Approved Processes and Specifications Requirements) lists which special processes are approved for Boeing suppliers and whether each process must be NADCAP accredited. For forging manufacturers, heat treatment and NDT are the critical processes. Primary structure forgings (wing attachment fittings, engine mounts) typically require NADCAP. Secondary structure (floor fittings, door frames) may allow AS9100D-covered heat treatment without NADCAP. Indian forging manufacturers must review D1-4426 for the specific part number classification before committing to Boeing supply the NADCAP requirement is a hard gate that cannot be waived.