AF Form 4090: KC-10 Flight Plan and Fuel Log [Download]

AF Form 4090: KC-10 Flight Plan and Fuel Log [Download] – AF Form 4090, officially titled the KC-10 Flight Plan and Fuel Log, is a specialized U.S. Air Force form (formerly AF IMT Form 4090) designed for documenting flight planning details and real-time fuel consumption on the KC-10 Extender aerial refueling tanker.

This form supported critical operations for the KC-10 fleet, which provided strategic air refueling, cargo transport, and aeromedical evacuation capabilities for over 44 years until its full retirement from USAF service on September 26, 2024. The last aircraft (tail 79-1948) departed Travis AFB, California, for storage at Davis-Monthan AFB.

Although the KC-10 is now retired and replaced by the KC-46A Pegasus, the AF Form 4090 remains a valuable historical and training reference for USAF air mobility personnel, flight engineers, instructors, and aviation historians studying legacy tanker procedures.

What Is AF Form 4090 Used For?

The primary purpose of AF Form 4090 is to record:

  • Flight plan data — Including route, waypoints, altitudes, speeds, and estimated times.
  • Fuel log — Tracking fuel loading, consumption, transfers (during air refueling), and remaining fuel at key points.

It combined planning and in-flight logging on a single document, helping crews monitor performance, ensure fuel reserves for safety, and comply with operational procedures in AFMAN 11-2KC-10 Volume 3 (KC-10 Operations Procedures).

Key benefits included:

  • Accurate fuel management for long-range missions (the KC-10 could carry over 356,000 pounds of fuel).
  • Documentation for post-flight analysis, maintenance, and safety reviews.
  • Support for dual-role missions (tanker + cargo/passenger transport up to ~170,000 pounds of cargo or 75 personnel).

The form was last revised around July 1, 1999, with guidance often cross-referenced to KC-10 technical orders (TO 1C-10(K)A-1 Flight Manual) and related worksheets like the KC-10 Fuel Planning Worksheet (FPW).

Structure of AF Form 4090

While the exact layout appears on the official PDF, the form generally features dedicated sections for:

  1. Header/Administrative Data — Mission number, date, aircraft tail number, crew information, and departure/arrival bases.
  2. Flight Plan Section — Route segments, true airspeed, altitudes, winds, estimated time enroute (ETE), and fuel burn predictions. This aligned with computer flight plans (CFP) generated via systems like JMPS or MAFPS.
  3. Fuel Log Section — Columns for recording fuel quantities at takeoff, checkpoints, after air refueling events, and landing. It tracked burn rates, offloads to receivers, and reserves (with minimum ramp fuel load guidance, such as 50,000 lbs in some procedures).
  4. Remarks/Notes — Space for deviations, actual vs. planned performance, emergencies, or additional calculations.

The form supported precise in-flight fuel analysis, equal time point (ETP) planning, and divert considerations—critical for global mobility missions.

Download the Official AF Form 4090 PDF Here:
https://static.e-publishing.af.mil/production/1/af_a3/form/af4090/af4090.pdf

This is the direct link from the official Air Force e-Publishing site. Always use the latest version from e-publishing.af.mil for any archived or training purposes.

How to Fill Out AF Form 4090? (General Guidance)

Note: Specific block-by-block instructions are printed on or accompany the form itself, supplemented by unit SOPs, AFMAN 11-2KC-10V3, and the aircraft flight manual. General best practices include:

  • Pre-Flight Planning: Use approved software for the computer flight plan (CFP). Transfer key data (route, winds, performance) to the form. Calculate fuel using KC-10-specific graphs and the Fuel Planning Worksheet. Verify navigation databases (updated every 28 days) and cross-check waypoints against FLIP documents.
  • Fuel Calculations: Factor in taxi, takeoff, climb, cruise, descent, reserves, and potential air refueling offloads. Account for cargo/passenger weight effects on performance.
  • In-Flight Logging: The flight engineer (or designated crewmember) typically updates fuel quantities at regular intervals or checkpoints. Record actual burns and adjust for winds or deviations.
  • Air Refueling Entries: Log offload amounts, receiver types, and any boom/drogue specifics.
  • Post-Flight: Complete remaining fuel, discrepancies, and signatures for the aircraft forms package (AFTO 781 series).

Accuracy is essential—errors in fuel planning could impact mission safety or compliance with AFI 11-202 General Flight Rules.

Related forms often used with AF Form 4090 include:

  • AF Form 4089 (KC-10 TOLD Card Worksheet)
  • AF Form 4091 (KC-10 Flight Engineer Worksheet)
  • AF Form 4095 (KC-10A Load Planning Worksheet)

Context: KC-10 Operations and Legacy

The KC-10 Extender, based on the DC-10 airframe, was a workhorse for Air Mobility Command (AMC). It excelled in:

  • Boom and drogue refueling (up to 1,100 gpm boom).
  • Long-range deployments with combined tanker/cargo capability.
  • Support for operations worldwide, from Gulf War missions to routine fighter escorts.

Fuel planning was complex due to its large capacity (six tanks) and variable mission profiles. Procedures emphasized conservative reserves, performance calculations from TO 1C-10(K)A-1-1, and crew resource management.

With the KC-10’s retirement in 2024, current USAF tanker crews use updated procedures and forms tailored to the KC-46A Pegasus and remaining KC-135 fleet. Modern tools emphasize digital flight planning, but the principles of precise fuel logging remain foundational.

Who Needs AF Form 4090?

  • Active/Reserve/ANG Air Mobility Personnel studying legacy systems or for historical training.
  • Flight Engineers and Instructors reviewing KC-10-specific techniques.
  • Aviation Historians and Enthusiasts documenting USAF tanker evolution.
  • Contractor or Simulator Support roles referencing past operations.

For current operations, consult the latest AFMAN 11-2KC-46 or KC-135 volumes and e-publishing.af.mil.

Additional Resources

  • Official KC-10 Fact Sheet (archived): af.mil
  • AFMAN 11-2KC-10 Volume 3 (Operations Procedures)
  • Air Force e-Publishing (search for KC-10 or Form 4090)
  • FAA or DoD flight plan guidance (DD Form 175 for military flight plans)

Important: This article is for informational and educational purposes. Always refer to current Air Force instructions, technical orders, and your unit’s directives. Forms and procedures evolve, and the KC-10 is no longer in operational service.

If you need help locating related KC-10 documentation or understanding modern equivalents for the KC-46, feel free to provide more details.

Keywords: AF Form 4090, KC-10 Flight Plan and Fuel Log, KC-10 Extender, USAF tanker forms, KC-10 fuel planning, download AF 4090 PDF, legacy Air Force forms.