The Naval Air Systems Command awarded Lockheed Martin Corporation a $14,545,797 cost-plus-incentive-fee order for flight test instrumentation procurement and installation on CF-5 aircraft to support F-35C carrier variant ship suitability testing. The award, announced in the May 5, 2026, Department of War contract announcements and contracting through the Naval Air Warfare Center Aircraft Division at Patuxent River, Maryland, addresses what program officials describe as a critical near-term testing gap: the F-35C fleet currently lacks dedicated instrumented aircraft capable of capturing the structural loads, aerodynamic data, and system performance metrics required during carrier-based catapult launch and arrested landing tests. The contract runs through May 2028 and directs approximately $4 million in fiscal 2025 research, development, test, and evaluation funds at award.

The carrier suitability testing gap

Carrier suitability testing is among the most demanding phases in any naval aircraft's development lifecycle. During carrier integration trials, an aircraft must demonstrate that it can withstand the structural and aerodynamic stresses of catapult launches from carrier deck catapults, arrested landings using the arresting gear, and repeated deck operations in the high-vibration, salt-spray environment of a carrier air wing. These tests are not simply performance demonstrations — they are engineering data-collection programs that require instrumented aircraft capable of recording thousands of channels of sensor data across dozens of test points per day.

The F-35C, the Navy's carrier-capable variant of the Joint Strike Fighter, has been performing carrier suitability testing for years using flight science aircraft that were instrumented during the system development and demonstration phase. Those aircraft are aging, and as the program transitions to Block 4 capability — the latest software and hardware upgrade package that adds advanced weapons integration, electronic warfare improvements, and enhanced sensors — the existing instrumented jets are not configured to capture Block 4-specific parameters. The CF-5 designation in this award refers to a specific F-35C test aircraft that will receive new instrumentation to bridge the gap between the old flight science jets and the three new fully instrumented Block 4 flight science aircraft ordered from Lockheed Martin in April 2026 under a separate $177.5 million contract for one aircraft per variant.

The April 2026 flight science contract context

On April 23, 2026, the Pentagon awarded Lockheed Martin a $177.5 million modification to build three new dedicated flight science aircraft — one F-35A, one F-35B, and one F-35C — equipped from the ground up with comprehensive Block 4 instrumentation. That contract funds the long-term solution; the CF-5 instrumentation award is the near-term bridge. The three new jets are expected to be ready for testing operations by approximately 2031, meaning there is a multi-year window during which Block 4 testing must rely on existing or partially upgraded aircraft. The CF-5 instrumentation project fills that window for the F-35C carrier program specifically, ensuring continuity in the ship suitability trial schedule while the new test jets are being built.

This two-track approach — bridge instrumentation now, full solution later — is consistent with how the Joint Program Office has managed the F-35's test program throughout its history. The program's complexity and the long lead times involved in instrumented aircraft production make bridging solutions a recurring feature of the test and evaluation schedule. The CF-5 effort allows carrier testing to continue at the developmental cadence the Navy needs without waiting for the new Block 4 flight science jets that are still years from delivery.

Work locations and structure

Work under the cost-plus-incentive-fee order will be performed across multiple locations: Fort Worth, Texas serves as the primary hub for Lockheed Martin's F-35 production and test operations. Additional work sites include Orlando, Florida; Linthicum, Maryland; Nashua, New Hampshire; San Diego, California; El Segundo, California; Samlesbury, United Kingdom; and additional domestic and international locations. The geographic distribution reflects the distributed nature of the F-35 supply chain and test support network, which spans Lockheed Martin's own facilities, major subcontractors, and government test ranges.

The contract type — cost-plus-incentive-fee — is notable in the context of the April 30, 2026, executive order directing agencies to default to fixed-price contracting. R&D and test work of this nature falls within the executive order's explicit exemptions for research, development, and pre-production development, making cost-plus a permissible and appropriate contract type here. The CPIF structure specifically adds financial incentives tied to achieving defined performance targets, aligning contractor and government interests on test program productivity without the full risk-transfer of a fixed-price arrangement in a technically uncertain environment.

F-35C program status

The F-35C is the smallest of the three JSF variants by production volume but the most technically demanding, given the structural requirements imposed by carrier operations. The Navy currently operates F-35Cs in several carrier air wing squadrons, with additional aircraft being delivered as the program ramps toward its full production rate. Key tests for the Block 4 configuration were expected to begin in 2026 — approximately two years after the Block 4 jets rolled off the production line in 2024, a timeline that Defense News reported in February 2025 reflected the complexity of the upgrade and the availability of instrumented test assets.

The carrier suitability testing program at Patuxent River is conducted by the Air Test and Evaluation Squadron Nine (VX-9) and the Naval Air Systems Command's F-35 test team, which coordinates with the Marine Corps and the Joint Program Office. NAVAIR has been working to maintain test tempo despite the instrumented aircraft availability challenge, in part by carefully sequencing Block 4 test points to use available assets efficiently. The CF-5 instrumentation upgrade provides additional flexibility to that sequencing effort.

What it means for contractors

  • Defense firms specializing in flight test instrumentation systems — including data acquisition hardware, sensors, telemetry systems, and ground support equipment — should be aware that NAVAIR is actively investing in F-35 test infrastructure and may issue additional solicitations for instrumentation upgrades as Block 4 and subsequent upgrade packages mature.
  • The concurrent $177.5M new flight science aircraft contract and the $14.5M CF-5 bridge contract illustrate a pattern of layered investment in test capability — firms that can support both near-term modifications and long-program new-build instrumentation platforms are well-positioned in the F-35 test ecosystem.
  • The cost-plus-incentive-fee contract structure used here, and its exemption from the fixed-price EO, confirms that flight test and R&D programs retain access to cost-type contracts — defense firms working in these segments should document the R&D nature of their work carefully to preserve this flexibility in discussions with contracting officers who may be responding to EO compliance pressure.
  • Subcontractors and suppliers to Lockheed Martin's F-35 test operations at Fort Worth and Patuxent River should expect activity related to this contract to generate procurement actions in the second and third quarter of 2026.

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