Sailors refuel a CH-53K King Stallion assigned to US Marine Heavy Helicopter Squadron (HMH) 461 during flight operations, 4 December, 2025. Photo: US NavyGE Aerospace has secured a $1.4 billion contract from Naval Air Systems Command (NAVAIR) for Lots 9–13 of T408 engines, continuing its support for the US Marine Corps’ CH-53K King Stallion heavy-lift helicopter.
The CH-53K, powered by three T408 turboshaft engines, can lift 36,000 pounds, refuel mid-air, and provide ship-to-shore mobility for multiple assault support missions. This latest multi-year award follows six previous contracts, including a $684 million Lot 6–8 block-buy announced in April 2023. Under the agreement, GE Aerospace will deliver new production and spare engines, along with sustainment services. Final assembly will take place at uthe company’s Lynn, Massachusetts facility.
Scott Snyder, Heavy Lift Engines Programme director, said: “This latest contract is a testament to the T408’s ability to deliver the power, durability and efficiency the Marine Corps depends on. We are honoured to support the CH-53K and the critical mission it performs for Marines, joint forces and allies around the globe.”
Each T408 engine provides 7,500 shaft hp — 57% more power than its predecessor, the T64 — while offering improved fuel efficiency and maintainability. The CH-53K delivers three-times the range and payload capacity of the CH-53E Super Stallion, enabling transport of heavy equipment, troops and supplies.
Compared to the T64, the T408 offers 18% better specific fuel consumption, reducing lifecycle costs. It also features 63% fewer parts and advanced designs, including a rugged compressor with erosion coating and split casing, improving reliability and maintainability for greater aircraft availability.
In addition to Lynn, GE Aerospace facilities in Hooksett (NH), Rutland (VT), Madisonville (KY), Dayton (OH) and Jacksonville (FL) supply components for the programme. Germany-based MTU Aero Engines, a T408 program partner, produces the power turbine.