What project 673504 buys
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 $317,510 thousand for acceleration of Engine and Power Thermal Management timelines.
- Product Development
- Support
Project 673504 funding, FY2025–FY2031
Prior years are actuals, the budget year is the request, and the outyears are the FYDP plan. Estimate types are colored and never summed into one figure. Projects carry the full five-year plan; the activities inside them stop at the budget year.
| Fiscal Year | Estimate Type | Amount ($M) |
|---|---|---|
| FY2025 | Actual | 166.1 |
| FY2026 | Enacted | 121.0 |
| FY2027 | Request | 94.1 |
| FY2028 | Outyear | 229.2 |
| FY2029 | Outyear | 247.5 |
| FY2030 | Outyear | 224.6 |
| FY2031 | Outyear | 214.6 |
1 accomplishment / planned program
The R-2A exhibit — the only level of the budget that describes work that has not happened yet. Activities carry the prior, current and budget year only, no five-year plan. Each describes FY2027 work in enough detail to have its own page; the rest are shown here in full. Coverage is partial across the corpus, so count activities, never total them.
Continue Organizational Level support for all F135 Flight Test Block 4 Propulsion Systems and Intermediate Level support for a select few Propulsion systems as required by the Test & Evaluation team. This will include Engine Flight Test Mechanics, Flight Test Engineering, Engine Hardware, Test Engine Procurements, and other associated…
Read the FY2027 plan →Named performers on project 673504
Performers named in the R-3 exhibit under this project. Share is of the project's whole FY2027 R-3 total — the same denominator the program-element split uses, so the two read on one scale and will not sum to 100% when unnamed or government work is in the mix. Budget-justification contract funding, not obligations.