Northrop Grumman has begun modernization and sustainment work on the B-21 Raider while the stealth bomber remains in flight testing and has yet to enter service with the US Air Force. The parallel activity extends the programme beyond development and Low-Rate Initial Production, establishing life-cycle support and capability upgrades before the first aircraft become operational.
Chief executive Kathy Warden disclosed the development during Northrop Grumman’s third-quarter 2026 results presentation. The company is conducting flight testing, producing initial aircraft and preparing for the long-term operation and maintenance of the Raider at the same time. Warden also indicated that the aircraft is meeting its key performance requirements.
The B-21’s open systems architecture is intended to support future software changes and the integration of new sensors, weapons and other systems without extensive alterations to the aircraft’s basic design. Northrop Grumman has not identified specific upgrade packages, technologies, costs or schedules for the work.
The company is also expanding manufacturing capacity for the programme. Most of the additional infrastructure is expected to be available by 2028, with increased production volumes anticipated later in the decade. The development points to a programme model in which production, sustainment and modernization progress continuously rather than being treated as separate post-entry activities.