# F-35 C2D2 — Program Element 0604840F

**Program element:** 0604840F  
**Component:** U.S. Air Force  
**Appropriation:** 3600 — RDT&E, Air Force  
**Budget Activity:** 7 — Operational System Development  
**Vintage:** President's Budget PB2027  
**Canonical URL:** https://hitchintel.com/programs/0604840F

## Summary

U.S. Air Force funding ramps 18% to a $1.13B request in FY2027, sustained across the five-year plan. In the FY2027 defense authorization, the House added 0.9% (to $1.14B); the Senate funded it in full; House appropriators added 9.3% (to $1.23B). LM leads the industry work.

## Funding profile

| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 1,099.3 |
| FY2026 | Enacted | 960.6 |
| FY2027 | Request | 1,128.7 |
| FY2028 | Outyear | 1,600.6 |
| FY2029 | Outyear | 1,638.2 |
| FY2030 | Outyear | 1,481.5 |
| FY2031 | Outyear | 1,298.0 |

> Estimate types are not summed — the profile mixes actuals, enacted law, the request, and outyear projections.

## Congressional marks (FY2027)

| Stage | Marked ($M) | Change ($M) |
|---|---|---|
| Request | 1,128.7 | — |
| House NDAA (HASC) | 1,138.7 | +10.0 |
| Senate NDAA (SASC) | 1,128.7 | +0.0 |
| House Approps (HAC-D) | 1,233.7 | +105.0 |

> FY2027 NDAA authorization marks, as of 2026-07-27. Not appropriations or final law.

## Projects (11)

| Project | Title | FY2025 actual | FY2026 enacted | FY2027 request | Move |
|---|---|---|---|---|---|
| 673502 | Air Vehicle Block 4 Planning & Sys Eng | 326.8 | 210.4 | 475.4 | +126% |
| 673503 | Test and Evaluation (T&E) | 283.0 | 289.6 | 284.6 | −2% |
| 673504 | Propulsion (PP) | 166.1 | 121.0 | 94.1 | −22% |
| 673508 | Infrastructure & Support Costs | 159.1 | 130.3 | 90.9 | −30% |
| 673507 | Training Systems & Simulation | 44.7 | 74.3 | 72.0 | −3% |
| 673506 | Combat Data Systems (CDS) | 38.0 | 46.7 | 40.0 | −14% |
| 673505 | Maintenance Systems (MxS) | 32.5 | 39.6 | 37.4 | −5% |
| 673509 | DevSecOps | 13.0 | 19.9 | 19.7 | −1% |
| 673501 | Air Vehicle - Tech Refresh 3 | 16.8 | 1.2 | 9.5 | +684% |
| 673510 | Utility and Subsystem Support to Mission Systems | 19.3 | 27.3 | 5.1 | −81% |
| 674871 | Information Operations Technology | 0.0 | 0.3 | 0.0 | −100% |

> Projects are the summable leaves: the program element total is their sum, never added to it.

### Project 673502 — Air Vehicle Block 4 Planning & Sys Eng

The F-35 Air Vehicle Program Management Office (AV PMO) development portfolio includes efforts to improve the F-35 air vehicle lethality, survivability, and interoperability in response to emerging threats outlined in the National Security Strategy and Operational Plans. F-35 Block 4 Modernization is designed to counter the full spectrum of evolving near-peer enemy threats to ensure US and Allied forces have freedom of operation even in the face of advanced adversary Anti-Access/Area Denial (A2/AD) capabilities. As designed, Block 4 consists of three principal lines of effort: development of software-based capabilities, development and integration of new and modernized aircraft hardware that enable the development of new capabilities, and new weapons integration. Efforts under the Air Vehicle / Block 4 Planning and Systems Engineering project range from requirements decomposition and preliminary design of capabilities through completion of Developmental Flight Test. These activities are a continuation of the previous Block 4 developmental contracts, and include activities required to enable the successful completion of Flight Test, to include select facility upgrades required for research, development, test and evaluation. Block 4 upgraded capabilities and continuous improvements will maintain Air System viability against the evolving threats indicated in the Electronic Warfare Initial Capabilities Document (ICD), the Fifth Generation Fighter Modernization ICD, and the Block 4 Capability Development Document (CDD). Additionally, the Block 4 capabilities will reduce life cycle cost, improve Air System Integration, and improve operational suitability. Weapons integration efforts under this project deliver increased lethality, effectiveness, situational awareness and operational flexibility, and include M-code GPS compatibility, Advanced Integrated Fire Control implementation, network enabled weapons, increased Air-to-Air missile carriage, and employment envelope expansion. Beyond Line of Sight (BLOS) efforts under this project will deliver increased range and effectiveness of the F-35, by providing improved interoperability across joint platforms within a highly contested environment.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** LM (378.7, 80%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Air Vehicle Block 4 Planning & Sys Eng | 326.8 | 210.4 | 475.4 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 673503 — Test and Evaluation (T&E)

Integrated Test activities in support of C2D2, to include Lockheed Martin support at all test sites. Non-recurring engineering required to plan for the service life extension of existing DT aircraft and modifications necessary to bring DT aircraft fleet to a more production-representative and sustainable configuration, and to develop flight test instrumentation and release test software to meet Block 4 requirements. Additional upgrades required to support development and evaluation of improvements driven by changes in the threat environment and as identified in the Electronic Warfare ICD, the Fifth Generation Fighter Modernization ICD, and the Block 4 Capability Development Document (CDD). Efforts include non-recurring engineering and procurement of a test article to evaluate service life of F-35B STOVL Aircraft. Integrated test also supports the evaluation of upgrades to Autonomic Logistics Information System (ALIS), fielding of Operational Data Integrated Network (ODIN) Base Kits, regression testing of fielded weapons upgrades, and various validation/verification efforts. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F. Funding allocations at the project level have historically been subject to change due to the complexity of the F-35 budget structure and cost share ratios. The program will ensure any within-PE adjustments during execution year are reflected in future budget submissions. The FY2027 request for Test & Evaluation includes $284,640 thousand of discretionary and $49,384 thousand of mandatory for a total of $334,024 thousand for Flight Science Aircraft and Block 4 capability development.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** LM (234.7, 82%), Edwards AFB, CA (25.2, 8.9%), NAWCAD (15.6, 5.5%), Nellis AFB, NV (6.4, 2.3%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Development Foundation Contract (DFC) Flight Test and Tech Refresh | 89.4 | 91.8 | 72.0 |
| Developmental Test (DT) | 36.7 | 36.3 | 38.8 |
| Operational Test (OT) | 15.9 | 12.8 | 14.1 |
| Future Flight Test Capabilities/Investments (FI) | 137.4 | 141.8 | 138.3 |
| Digital Infrastructure (DI) | 3.6 | 7.0 | 21.5 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 673504 — Propulsion (PP)

Propulsion F135 projects within the Continuous Capability Development & Delivery (C2D2) are provided for developmental efforts for propulsion systems and test engine requirements such as Block 4 Integrated Flight Test Support, Engine Flight Test Mechanics, Flight Test Engineering, Engine Hardware, Test Engine Procurements, research, component, and capability development, prototypes, various studies, costs integral to support the developmental stages for F-35 engine modernization, affordability drivers for top engine availability degraders, and improvement to support the F135 Propulsion System for the F-35 Air Vehicle. Testing and development of the three F-35 aircraft variants require engine propulsion funding to enable continued flight hours. Flight hours are budgeted and planned to meet the Block 4 Flight Test timelines and required Flight Test support. Transition of Flight Test Support requirements to organic capability includes efforts performed by contractor and government installations, Autonomic Logistics Information System / Operational Data Integrated Network (ALIS/ODIN) transition, replacement of development-only hardware, and updating Joint Technical Data (JTD) packages as required. The F-35 engine is being modernized with the F135 Engine Core Upgrade (ECU), which is part of the Engine, Power, and Thermal Management Modernization (EPM) program. The F135 ECU is projected to recapture engine life for increased affordability while providing additional power and cooling capacity to support future mission systems enhancements for the global F-35 fleet. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F. Funding allocations at the project level have historically been subject to change due to the complexity of the F-35 budget structure and cost share ratios. The program will ensure any within-PE adjustments during execution year are reflected in future budget submissions. The FY2027 request for Propulsion includes $94,102 thousand of discretionary and $223,408 thousand of mandatory for a total of $317,510 thousand for acceleration of Engine and Power Thermal Management timelines.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** Pratt & Whitney (90.8, 96%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Propulsion (PP) | 166.1 | 121.0 | 94.1 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 673508 — Infrastructure & Support Costs

The F-35 Joint Program Office equips U.S. and allied forces with operational F-35 weapon systems in support of military and national security operations. The acquisition and product support workforce provides cutting edge weapon systems, sustainment capabilities, and is charged with providing management, tools, and technical and business capabilities needed to oversee acquisition programs throughout their life cycle. The acquisition workforce funded in this program element will support development phases of acquisition programs to include material solution analysis, technology development, engineering and manufacturing development. This funding does not include costs for base operating support civilian personnel. This program element supports both civilian pay and non-pay support requirements. Additional infrastructure and program management support costs include travel, supplies, contractor support including advisory and assistance support, off-base lease costs, program office IT, cybersecurity, model-based systems engineering, and risk reduction studies including audit readiness and affordability initiatives directly related to C2D2 development efforts. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F. Funding allocations at the project level have historically been subject to change due to the complexity of the F-35 budget structure and cost share ratios. The program will ensure any within-PE adjustments during execution year are reflected in future budget submissions.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** Wright Patterson AFB, OH (69.3, 76%), WHS,USACE, 88th CPTS (12.5, 14%), DLA (3.6, 4.0%), BAH (2.1, 2.3%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| F-35 JPO AFLCMC Civilian Pay | 113.5 | 95.3 | 69.3 |
| Core Program Support/Contract Support Services (CSS) Support | 45.6 | 35.0 | 21.6 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 673507 — Training Systems & Simulation

The F-35 Training Systems & Simulation Program Management Office (TSS PMO) development portfolio is aligned with the program's Continuous Capability Development & Delivery (C2D2) efforts and is organized in three primary lines of effort; Training System Capability Development (TSCD), Training Systems Architecture (TSA) Development, and Joint Simulation Environment (JSE) Development. Training System Capability Development (TSCD): Efforts will continue with a primary focus on alignment of Training System capabilities with other elements of the Air System. Specific efforts will include accelerating development of Block 4 capabilities to equivalent maturity of those in the Air Vehicle, continued development of the Production Runtime Server (PRTS) - Pilot Training Device TR-3 equivalent - to enable Block 4 capabilities, continued development of Live-Virtual-Constructive (LVC) capabilities including Distributed Mission Training (DMT), and appropriate lab infrastructure to enable Training System development. Training Systems Architecture (TSA) Development: Development efforts will continue to focus on modernization of activities outlined in the TSS PMO roadmaps that will target the requirement of bringing higher fidelity training to the warfighter. Specific development and testing efforts focus on software architecture modernization, hardware architecture modernization, and Synthetic Threat Enhancement. Joint Simulation Environment (JSE): Development, integration and testing efforts will continue to focus on keeping F-35 In-A-Box (FIAB) software concurrent with aircraft capabilities and injecting complex threat/sensor models to establish an operationally representative simulation environment required for operational test trial validity, and the completion of Verification, Validation and Accreditation (VV&A) activities for F-35 Block 4 modernization. Efforts will include FIAB development, fidelity and capability upgrades to existing threats/sensors/weapons models, development of new threat/sensor/weapon models, and environment upgrades to enable effective verification of Block 4 capabilities. Efforts will continue toward expansion of JSE capability to F-35 Training Sites including expansion of JSE Operational Enclave (JOE) T&E infrastructure at LM to facilitate accelerated JOE test activities and earlier fielding of USAF JOE training capability.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** Lockheed Martin (65.0, 90%), NAWCAD (7.0, 9.8%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Training Systems Capability Development (TSCD) | 24.7 | 39.7 | 40.4 |
| Training Systems Architecture (TSA) Development | 8.4 | 10.0 | 9.0 |
| Joint Simulation Environment (JSE) Development | 11.6 | 24.7 | 22.6 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 673506 — Combat Data Systems (CDS)

F-35 Combat Data Systems (CDS) Program Management Office mission includes investment and modernization activities required for Block 4 development, integration, test and evaluation of Mission Data Hardware/Tools, Reprogramming Verification & Validation Systems (RVVS), and Mission Planning Software/Hardware, which includes the Next Generation Open Mission System (NOMS). Funding related to key deliveries to Electronic Warfare Squadrons and F-35 Operational Squadrons and enables government and contractor labor for mission planning and joint reprogramming enterprise. Other costs support Technology Investment for key Modernization/ Innovation activities and Cloud-based DevSecOps infrastructure. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F. Funding allocations at the project level have historically been subject to change due to the complexity of the F-35 budget structure and cost share ratios. The program will ensure any within-PE adjustments during execution year are reflected in future budget submissions. The FY2027 request for Combat Data Systems includes $40,002 thousand of discretionary and $19,000 thousand of mandatory for a total of $59,002 thousand for Block 4 capability development.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** LM (32.9, 82%), Eglin AFB (7.1, 18%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Joint Reprogramming Environment (JRE) | 18.0 | 20.3 | 19.7 |
| Mission Planning Environment (MPE) | 20.0 | 26.5 | 20.3 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 673505 — Maintenance Systems (MxS)

Autonomic Logistics Information System (ALIS) is the current F-35 program solution for delivering core maintenance and logistics information solutions to F-35 warfighters. ALIS will continue to deliver the core logistics and maintenance infrastructure requirements for the F-35 enterprise as ALIS evolves into Operational Data Integrated Network (ODIN). ALIS includes features such as aircraft scheduling, training delivery, record keeping, technical data delivery, supply chain management, maintenance management, pilot and maintenance debriefing, and mission planning. Current ALIS development efforts are focused on low cost and high return investments that provide a high confidence return on investment in the short term, significant warfighter impact, and/or offer synergy with ODIN development efforts. ODIN will incrementally provide a modern, user-friendly integrated information system for the F-35 to deliver core maintenance and logistics information solutions. ODIN will be comprised of multiple elements to include modern hardware, architectures, software development methods, data environments, and platforms. Leveraging agile and modern software development practices, ODIN will serve as the primary logistics tool to support F-35 warfighter operations, health and diagnostics, mission planning, supply chain management, maintenance, and training. ODIN will substantially decrease F-35 administrator and maintainer workload, increase readiness rates for all F-35 variants, and allow software engineers to rapidly develop and deploy updates in response to changing warfighter requirements and improve data management, quality, and integrity. The ALIS to ODIN transition is intended to enable holistic fleet management, improve performance, enhance readiness, and reduce costs to the F-35 program. ODIN is comprised of both hardware and software which support the flow of Unclassified and Classified aircraft and maintenance-related data. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F. Funding allocations at the project level have historically been subject to change due to the complexity of the F-35 budget structure and cost share ratios.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** LM (25.0, 67%), 309th SWEG (2.0, 5.3%), PW (1.6, 4.2%), DESA (1.0, 2.6%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Operational Data Integrated Network (ODIN) | 32.5 | 39.6 | 37.4 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 673509 — DevSecOps

The F-35 Software Development, Security & Operations (DevSecOps) Cloud platform environment allows for US Government and contracted software development teams to produce, test and deploy capabilities for F-35 supported Project Management Offices (PMO) and Directorates. This includes providing support to the Combat Data Systems (CDS), Air Vehicle (AV), Maintenance Systems (MxSYS), Propulsion, Training Systems and Simulation (TSS) PMOs, and Directorate of Engineering. The mission of DevSecOps is to provide a centralized F-35 Data repository, a consolidated F-35 software development environment, and support for system development lifecycle (SDLC) of the F-35 platform, allowing for rapid release cycles to keep the F-35 ahead of its adversaries. Investment in, and modernization of, DevSecOps include efforts to support F-35 Software modernization efforts, develop organic government software capabilities, support SDLC and flight-testing capabilities, enhance the security posture of the software development pipeline, and support goals of reducing long-term on-premises infrastructure environments cost, ultimately resulting in reducing fleet delivery timelines. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F. Funding allocations at the project level have historically been subject to change due to the complexity of the F-35 budget structure and cost share ratios. The program will ensure any within-PE adjustments during execution year are reflected in future budget submissions.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** August Schell Enterprises (5.8, 30%), Amazon Web Services (3.3, 17%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| DevSecOps Support | 13.0 | 19.9 | 19.7 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 673501 — Air Vehicle - Tech Refresh 3

Technology Refresh 3 (TR-3) conducts post Critical Design Review (CDR) design activities. This effort will develop and deliver a TR-3 system through full flight-worthy certification and production readiness review. The design of TR-3 subsystems Integrated Core Processor (ICP), Aircraft Memory System (AMS), and Panoramic Cockpit Display Electronics Unit and Display Unit (PCD-EU, PCD-DU) configurations will contain new backplane technology, commercial operating systems, and modified middleware necessary to support Block 3F functionality and incorporation of all Block 4 capabilities. This work includes nonrecurring engineering for the development, test, and certification of the ICP, AMS, PCD-EU, and PCD-DU, and includes processing capacity to ensure long term viability for future capabilities. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F. Funding allocations at the project level have historically been subject to change due to the complexity of the F-35 budget structure and cost share ratios. The program will ensure any within-PE adjustments during execution year are reflected in future budget submissions.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** LM (9.5, 100%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Technology Refresh 3 (TR-3) | 16.8 | 1.2 | 9.5 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 673510 — Utility and Subsystem Support to Mission Systems

The Power Thermal Management Upgrade (PTMU) program will provide the required power and cooling upgrade to the current F-35 thermal management system to meet the estimates for a 5th Generation F-35 fighter. During development, air vehicle cooling requirements grew to exceed planned bleed air extraction. To provide the necessary bleed air, the engine was required to run hotter, and early engineering assessments indicate that this increase in operating temperature decreases engine life, resulting in earlier depot inductions and an increase in life cycle cost. Future capabilities and mission systems will be limited by PTMS cooling capacity. With threats continuing to develop, the F-35 requires new mission systems to out pace emerging threats to remain relevant and lethal. This upgrade may consist of modifications to the current Power Thermal Management System (PTMS), Fuel Thermal Management System (FTMS), and Electrical Power System (EPS). This work includes nonrecurring engineering for the development, test, and certification of the upgraded PTMS, FTMS, and EPS systems to ensure suitable cooling is available for future capacities. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F. Funding allocations at the project level have historically been subject to change due to the complexity of the F-35 budget structure and cost share ratios. The program will ensure any within-PE adjustments during execution year are reflected in future budget submissions. The FY2027 request includes $5,122 thousand of discretionary and $71,959 thousand of mandatory for a total of $77,081 thousand for acceleration of Engine and Power Thermal Management timelines.

**Named R-3 performers** (share of this project's FY2027 R-3 total, so they need not reach 100%)**:** Lockheed Martin (5.1, 100%).

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Power Thermal Management Upgrade (PTMU) | 19.3 | 27.3 | 5.1 |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

### Project 674871 — Information Operations Technology

Procure Microsoft 365 Enterprise Licensing Upgrades for Improved Zero Trust (ZT) Capabilities. This program element included all necessary expenses required to manage, execute, and deliver weapon system capability. The use of such program funds would be in addition to the civilian pay expenses budgeted in program elements 0605829F, 0605831F, 0605833F, and 0605898F.

| Activity (R-2A) | FY2025 | FY2026 | FY2027 |
|---|---|---|---|
| Information Operations Technology | 0.0 | 0.3 | — |

> R-2A activities carry the prior, current and budget year only — no five-year plan. Coverage is partial, so count them, never total them.

## Where the FY2027 request goes

| Category | Share | $M |
|---|---|---|
| Industry primes | 89% | 1,007.8 |
| Government labs & warfare centers | 0.3% | 3.1 |
| Other / unspecified | 10% | 117.9 |

**Top named industry performers:** LM ($680.7M, 60%), Pratt & Whitney ($90.8M, 8.0%), Lockheed Martin ($70.1M, 6.2%), Wright Patterson AFB, OH ($69.3M, 6.1%), Edwards AFB, CA ($25.2M, 2.2%).

> R-3 exhibit contract funding, not USAspending obligations.

## Mission & acquisition strategy

The F-35 Joint Strike Fighter (JSF) Program will develop and field an affordable, highly common family of next generation strike aircraft for the United States Air Force, United States Navy, United States Marine Corps and International Partners countries. There are three variants: the F-35A Conventional Takeoff and Landing (CTOL), F-35B Short Take Off and Vertical Landing (STOVL), and the F-35C Carrier Variant (CV). Maximum commonality among the variants, consistent with National Disclosure Policy, will minimize total air system life cycle costs.

The Test & Evaluation Project will maximize use of existing F-35 contracts, where possible, for the various T&E-related capabilities and investments outlined in Sections A-C above. For example, provisions for new instrumentation on new flight test aircraft are being implemented when applicable via existing Production contracts in order to allow installation of the required hardware while those airframes are still on the assembly line. This will save significant costs and effort that would be required if instrumentation installation occurred after aircraft delivery.

## Related program elements

- [0604840M — F-35B C2D2](https://hitchintel.com/programs/0604840M) (Navy)
- [0604840N — F-35C C2D2](https://hitchintel.com/programs/0604840N) (Navy)
- [0207142F — F-35 Squadrons](https://hitchintel.com/programs/0207142F) (Air Force)
- [0603790F — Nato Coop R&D](https://hitchintel.com/programs/0603790F) (Air Force)

## Source & machine access

- **Source:** FY2027 Department of the Air Force RDT&E Budget Justification, Exhibits R-2/R-3, PE 0604840F (PB PB2027); FY2027 NDAA committee marks (as of 2026-07-27).
- **MCP:** `mcp.hitchintel.com` — `budget_get_program_element(pe="0604840F")`.

*HitchAI is an independent intelligence service, not affiliated with the U.S. Department of Defense. Budget figures are requests/estimates, not obligations.*