GKN Aerospace targets broader additive manufacturing rollout across major engine programs

GKN Aerospace is scaling its additive manufacturing footprint across multiple engine programs, building on production experience from its fan case mount ring (FCMR) for Pratt & Whitney geared turbofan engines. Since qualifying the first additively produced FCMR in 2023, the company has delivered over 600 units and achieved full-rate production in 2025. Chief technology officer Russ Dunn stated that inner and outer ring structures are "very much in progress of being certified," alongside split engine cases currently undergoing certification. GKN's 2025 annual report identified the FCMR as the "first of many planned technology insertions" with Pratt & Whitney, GE Aerospace, and Rolls-Royce, including additive fabrication for the GEnx and GE9X programs, and a titanium engine case nearly 2 meters in diameter for the CFM International RISE open-fan demonstrator.

This announcement matters because it demonstrates the aerospace qualification grind pattern in action: GKN is using the FCMR as a certification bridge to compress timelines for more complex structural components. The original FCMR took approximately seven years to reach service entry, but Dunn now expects subsequent certifications to take "maybe a couple of years rather than seven," citing process consistency data across facilities in Sweden, the United States, and the United Kingdom. Back-to-back testing of the same component across those three sites produced material properties within 1% variation. Production is primarily through laser metal deposition by wire (LMD-W), with a powder bed process also being developed for turbine struts on the LM2500 industrial gas engine as an initial certification pathway. This positions GKN as a Tier S contender in aerospace AM, where the real moat is not the hardware but the accumulated body of evidence that satisfies airworthiness authorities.

From an expert perspective, GKN's strategy is textbook: use a certified structural part to build a qualification dossier that shortens the path for subsequent, more complex components. The 1% cross-site variation is the critical data point that regulators and OEMs need to see before approving broader adoption. The practical next step is for GKN to execute on the certification timelines it has outlined, particularly for the split engine cases and ring structures, while continuing to accumulate production data that further reduces risk perception across its OEM partners.