IN Brief:
- The US Air Force is seeking funding for three additional EA-37B aircraft in FY2027, with seven more planned through 2031.
- The expansion would take the planned fleet to 22 aircraft, strengthening airborne electronic attack capacity.
- Industrial pressure will fall on airframe modification, BAE mission systems, L3Harris integration work, RF payloads, and software upgrade cadence.
The US Air Force is moving to expand its EA-37B Compass Call electronic attack fleet, seeking a larger force of missionised Gulfstream G550 aircraft as electromagnetic warfare becomes more central to contested air operations.
The service’s fiscal 2027 budget request includes $660m for three additional EA-37B aircraft, with seven more planned by 2031. If funded, the expansion would lift the planned fleet to 22 aircraft, well above the earlier procurement profile. The Air Force had initially moved toward a 10-aircraft buy despite a stated requirement for 12, before Congress added funding for two more aircraft in fiscal 2026.
The EA-37B replaces the older EC-130H Compass Call and shifts the mission from a turboprop transport-derived aircraft to a faster, smaller, and more efficient business jet platform. The aircraft is designed to disrupt enemy communications, navigation systems, and radar networks, supporting suppression of enemy air defences and operations against adversary command-and-control systems.
The platform is produced through a missionisation model that combines Gulfstream G550 airframes with L3Harris air vehicle integration and BAE Systems electronic attack mission equipment. Rather than building a clean-sheet military aircraft, the programme converts a commercial airframe into a specialised electromagnetic attack platform, adding mission payloads, antennas, operator systems, software, power, cooling, and test infrastructure through a controlled integration process.
The first five aircraft delivered to the Air Force were equipped in the Baseline 3 configuration, including the Advanced Radar Countermeasure System. Follow-on aircraft are expected to move into Baseline 4, incorporating the System-Wide Reconfigurable Dynamic Architecture. Electronic warfare systems age at a different pace from airframes, because threat emitters, waveforms, datalinks, radars, and air-defence networks change continuously. Fleet value therefore depends heavily on rapid mission-system updates and software-defined adaptability.
For manufacturers, the programme resembles a rolling technology insertion effort rather than a static aircraft build. Airframe modification has to be paired with RF hardware production, antenna installation, secure processing, mission-crew workstations, software loading, electromagnetic compatibility testing, cyber assurance, and flight testing. Each new baseline must work inside the aircraft’s power, cooling, weight, and certification limits while remaining maintainable for deployed units.
The wider defence market is moving in the same direction. Communications resilience, electronic attack, and spectrum control are now treated as production requirements rather than specialist support functions. IN Defence’s coverage of sovereign SATCOM terminals from Greenerwave and Telespazio showed the defensive communications side of that trend, where militaries want resilient connectivity across contested environments. EA-37B sits at the offensive edge, using airborne electronic attack to degrade an adversary’s sensors, command links, navigation, and weapons coordination.
The proposed expansion also reinforces the appeal of missionised business jets. L3Harris has positioned the EA-37B within a broader portfolio of multi-mission business jet solutions, including ISR, airborne reconnaissance, and electronic warfare applications. For air forces, business jet platforms can offer range, altitude, efficiency, lower operating costs, and faster modification routes than larger military aircraft. For industry, they create a competitive market around mission systems, integration expertise, testing, and long-term upgrade support.
Specialist capacity will be one of the hardest constraints. Missionising aircraft is not conventional final assembly. It requires engineering teams that understand civil-certified airframes and sensitive military payloads, along with hangar space, wiring and structural modification skills, electromagnetic test capability, secure software teams, flight-test crews, and suppliers able to meet high-end electronics requirements.
Sustainment adds another layer. Electronic attack aircraft rely on mission-data updates, threat libraries, spare RF components, antennas, processors, operator training, and software patching. Hardware can remain in service for years, but the mission system must keep pace with adversary emitters and tactics. Open architectures and reconfigurable systems are therefore central to long-term relevance, because expensive aircraft lose value quickly if each threat change demands a major redesign.
A larger EA-37B fleet would give the Air Force more availability, more training depth, and more deployment flexibility in a mission area that cannot be surged quickly. Airborne electronic attack depends on trained crews, specialised aircraft, classified payloads, and close coordination with air, cyber, space, and intelligence assets. Fleet size affects how often aircraft can deploy, how much maintenance slack exists, and how much capacity remains for training and development work.
For the industrial base, the proposed expansion signals sustained demand for electronic warfare production. Aircraft numbers are the visible measure, but the deeper workload sits with integrators, RF suppliers, software teams, test organisations, and support providers. As the electromagnetic environment becomes more crowded and contested, the production system behind EA-37B will have to evolve at the same pace as the threats it is designed to disrupt.