RDT&E Program Element · President's Budget PB2027

Survivable Airborne Operations Center

PE 0604288F·U.S. Air Force·Approp. 3600 — RDT&E·BA5 — System Development & Demonstration
FY2027 Request
$2.22B
⚑ Contested — House approps cuts 1.6%
HitchAI read

U.S. Air Force funding ramps 23% to a $2.22B request in FY2027. In the FY2027 defense authorization, the House funded it in full; the Senate funded it in full; House appropriators cut 1.6% (to $2.18B). Sierra Nevada leads the industry work.

FY2027 Request
$2,218.9M
▲ 23% vs FY2026
House approps mark
$2,184.4M
▼ $34.6M vs request
FY2026 Enacted
$1,801.3M
In law

For fiscal year 2027, the U.S. Air Force is requesting $2.22B for Survivable Airborne Operations Center under RDT&E program element 0604288F, up 23% over FY2026. In the FY2027 defense authorization, House approps moved to cut it to $2.18B.

Funding trajectory

Funding profile, 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.

7501,5002,25000.0FY25ACTUAL1,801.3FY26ENACTED2,218.9FY27REQUEST2,518.8FY282,710.1FY291,889.3FY301,352.6FY31HOUSE APPROPS
Actual Enacted Request Outyear (FYDP) House approps mark
Fiscal YearEstimate TypeAmount ($M)
FY2025Actual0.0
FY2026Enacted1,801.3
FY2027Request2,218.9
FY2028Outyear2,518.8
FY2029Outyear2,710.1
FY2030Outyear1,889.3
FY2031Outyear1,352.6
Where it sits

Acquisition lifecycle

This program is funded in RDT&E Budget Activity 5 — System Development & Demonstration.

Complete
Research
BA 1–2
Complete
Advanced Technology
BA 3
Complete
Prototyping
BA 4
Current
Development & Fielding
BA 5–7
Inside the program element

1 project rolls up into PE 0604288F

Projects are the summable leaves — the PE total is their sum, never added to it. Program elements and projects carry the full five-year plan; activities stop at the budget year. This PE moves 23% overall, which can hide much larger swings below.

Project 656507

Survivable Airborne Operations Center

$2,218.9MFY2027 request ▲ 23%
FY2025 actual$0.0M
FY2026 enacted$1,801.3M
FY2027 request$2,218.9M
Product DevelopmentSupportTest and EvaluationManagement Services

The Survivable Airborne Operations Center (SAOC), E-4C, replaces the aging E-4B fleet, which faces capability gaps, diminishing manufacturing sources, increased maintenance costs, and parts obsolescence as it approaches the end of its serviceable life. SAOC provides the President of the United States (POTUS), the Secretary of War (SECWAR), and the Joint Chiefs of Staff (JCS) a worldwide, survivable, and enduring node of the National Military Command System (NMCS) to fulfill national security requirements throughout all stages of conflict. As a command, control and communications center directing US forces, executing emergency war orders and coordinating the activities of civil authorities including national contingency plans, this capability ensures continuity of operations and continuity of government as required in a national emergency or after negation/destruction of ground command and control centers. SAOC fulfills the requirements of the Air Force (AF) Nuclear Mission by providing Nuclear Command, Control and Communications (NC3) capabilities to enable the exercise of authority and direction by the President to command-and control US military nuclear weapons operations. Program funding supports all activities required to execute development of the SAOC Weapon System to include system development, integration of NC3 and other Department of War (DoW) AF programs into the SAOC weapon system, test activities, pre-operational product support, and Interim Contractor Support (ICS). Funds also support program office operations, management services (Federally Funded Research and Development Centers [FFRDC], Advisory and Assistance Services [A&AS], etc.), Program Management Administration (PMA), security, facilities, prototyping, equipment, implementation of digital program initiatives, risk mitigation strategies, and other required program office capabilities. The FY 2026 spend plan amount for SAOC RDT&E includes $1,801,300 thousand of discretionary and $64,500 thousand of mandatory (reconciliation) for a total of $1,865,800 thousand. 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.

Accomplishments / planned programs (R-2A) — prior, current and budget year only
SAOC▲ 23%
FY2025 actual$0.0M
FY2026 enacted$1,801.3M
FY2027 request$2,218.9M

- Continue executing Engineering and Manufacturing Development (EMD) design activities to include system engineering, trade studies, system/subsystem engineering analysis, preliminary design and critical design for the aircraft, mission system, training systems, and supporting systems - Continue Mission System EMD development…

Read the FY2027 plan →
Congressional action

The request is contested

Committee marks on the FY2027 request. Adds and cuts are reconciled in conference before they become law.

RequestPresident's Budget
$2,218.9M
House NDAA (HASC)HASC
$2,218.9M full · +$0
Senate NDAA (SASC)SASC
$2,218.9M full · +$0
House Approps (HAC-D)HAC_D
$2,184.4M −$34.6M · −1.6%
▲ $34.6M chamber gap — unresolved as of 2026-07-27. These are FY2027 authorization marks (NDAA); appropriations and the conference agreement may differ.
Who's building it

Where the FY2027 request goes

Performers named in the R-3 exhibit, resolved into industry, government-lab, and unspecified shares. Budget-justification contract funding, not obligations.

Sierra Nevada
$2,066.1M · 93%
Prime - EMD · CPIF
Where FY2027 funding flowsShare$M
Industry primes95%2,106.7
Other / unspecified5.1%112.2
FY2027 request100%2,218.9
See Sierra Nevada's full federal contract ledger members
Program detail

Mission & acquisition strategy

The Survivable Airborne Operations Center (SAOC), E-4C, replaces the aging E-4B fleet, which faces capability gaps, diminishing manufacturing sources, increased maintenance costs, and parts obsolescence as it approaches the end of its serviceable life. SAOC provides the President of the United States (POTUS), the Secretary of War (SECWAR), and the Joint Chiefs of Staff (JCS) a worldwide, survivable, and enduring node of the National Military Command System (NMCS) to fulfill national security requirements throughout all stages of conflict.

Based on the Acquisition Strategy approved by Under Secretary of War for Acquisition and Sustainment on 30 June 2022, SAOC entered the acquisition pathway at Milestone B on 25 April 2024. On 26 April 2024, SAOC awarded a competitive Development contract with Production and Interim Contractor Support (ICS) options. This contract requires the Prime contractor to buy the required aircraft, bring each aircraft to a common configuration, make required modifications, develop, and integrate the mission system into each aircraft, provide required ground support systems and conduct contract support operations for fielded systems until the Operations and Support Phase.

Project 656507 — Survivable Airborne Operations Center
  • Product Development
  • Support
  • Test and Evaluation
  • Management Services
Ask Hitch

Ask this program element

Answers are generated from the figures on this page — the FY2027 justification exhibits and the marks tracked above — and nothing else is consulted. Confirm any figure against the cited exhibit before you use it externally.

H
Questions this page can answer
How does the FY2027 request compare with FY2026, and what does the five-year plan show?What did House approps do to this request, and what is still unresolved?How is the FY2027 request split between industry and government performers?In plain terms, what is this program element for and how is it being acquired?

This page carries the budget justification and the NDAA marks — nothing else. For what Sierra Nevada has actually been obligated, the ledger is at hitchintel.com/vendors; for live solicitations, hitchintel.com/opportunities. Both are member surfaces.

Provenance

Cite this page

Sources
FY2027 Department of the Air Force RDT&E Budget Justification · Exhibits R-2 / R-3 · PE 0604288F (President's Budget PB2027) — and FY2027 NDAA committee marks, as tracked 2026-07-27.
Suggested citation
HitchAI, "Survivable Airborne Operations Center (PE 0604288F)," federal budget intelligence, PB2027 vintage. hitchintel.com/programs/0604288F
Machine access
Markdown twin /programs/0604288F.md · MCP mcp.hitchintel.combudget_get_program_element, budget_get_cong_marks