AF Form 839: Flightline Daily Fuels Service Log (Download) – The AF Form 839, officially titled Flightline Daily Fuels Service Log, is a critical document used by U.S. Air Force fuels management teams to record daily aircraft refueling and defueling operations on the flightline. This form helps maintain accurate accountability, ensures safety compliance, supports operational readiness, and aids in auditing fuel transactions for aviation and ground fuels.
Whether you’re a fuels specialist, dispatcher, or supervisor in the Logistics Readiness Squadron (LRS), understanding how to properly use AF Form 839 is essential for mission success and regulatory adherence.
What Is AF Form 839 and Its Purpose?
AF Form 839 serves as the primary record for flightline fuels servicing activities. It logs each individual fueling or defueling service performed on aircraft or equipment throughout the day. Key purposes include:
- Tracking fuel issues (dispensed) and receipts by aircraft tail number, type, or equipment.
- Documenting quantities, fuel grades (e.g., JP-8, Jet A), times, and personnel involved.
- Supporting inventory reconciliation and daily fuel accounting.
- Providing audit trails for quality control, safety investigations, and compliance with fuels management policies.
- Helping calculate daily totals for reporting in related systems or forms like AF Form 1234 (Fueling Unit Inventory) or daily fuels request logs.
This form is referenced in Department of the Air Force Instruction (DAFI) 23-201, Fuels Management, which outlines procedures for daily fuels request and servicing. It falls under broader Air Force policy for bulk petroleum management (AFPD 23-2) and supports efficient flightline operations at main bases, deployed locations, and contingency sites.
Note: The official version is an older form (originally dated 1 March 1979 as AMC IMT Form 839), but it remains in active use across the USAF for manual or backup logging when automated systems are unavailable or as a supplementary record.
Who Uses AF Form 839?
- Fuels Dispatchers and Operators: Personnel operating refuelers, hydrant systems, or fuels handling equipment (FHE) on the flightline.
- Fuels Management Flight (FMF): For daily accountability and reporting.
- Maintenance and Airfield Support Teams: Coordinating with transient aircraft or special operations.
- Deployed/Contingency Units: Where paper-based logging provides reliability in austere environments (as guided in AFPAM 23-221 for fuels support planning).
It applies to Regular Air Force, Air Force Reserve, and Air National Guard units involved in aviation fuels operations.
How to Fill Out AF Form 839? (Step-by-Step Guidance)
While the exact block layout is detailed in the official PDF, typical sections include headers for date, shift, location, and then line-item entries for each service. Common elements to record:
- Header Information:
- Date of service
- Organization/unit
- Fuels vehicle/equipment identifier (e.g., refueler number)
- Operator/dispatcher name and signature
- Fuel type/grade
- Service Details (Per Row/Entry):
- Time of service (start/end)
- Aircraft tail number or equipment ID
- Aircraft type/model
- Quantity issued (gallons/liters)
- Quantity received (if defueling)
- Meter readings (before/after)
- Purpose (e.g., refuel, hot refuel, defuel for maintenance)
- Remarks (e.g., quality checks, issues, or special handling)
- Totals and Certification:
- Daily subtotal of fuel dispensed/received
- Signature of reviewer/supervisor
- Any discrepancies noted for follow-up
Best Practices:
- Use legible handwriting or approved digital tools.
- Perform product verification and contamination checks per DAFI 23-201 before each service.
- Cross-reference with fueling unit inventory records.
- Retain copies according to Air Force records disposition policies (AFMAN 33-363).
For the most accurate instructions and blank form, download the official AF Form 839 directly from the Air Force e-Publishing site:
https://static.e-publishing.af.mil/production/1/af_a4/form/af839/af839.pdf
Always verify the latest version and any local supplements through your unit’s publications library or e-Publishing.
Why Proper Use of AF Form 839 Matters?
Accurate logging prevents fuel accounting errors, supports cost-per-flying-hour tracking, and ensures compliance during inspections. In deployed settings, it helps manage limited stocks and coordinate with airfield management for equipment positioning.
Errors or incomplete entries can lead to inventory discrepancies, delayed reimbursements, or safety issues related to fuel quality. Fuels personnel must integrate this with broader procedures in DAFI 23-201 and supporting manuals like AFMAN 23-122 for materiel management.
Related Forms and Resources
- DAFI 23-201, Fuels Management (August 2023) — Primary policy for daily operations.
- AFPAM 23-221 — Guidance for fuels logistics planning, including flightline support.
- AF Form 500 (older daily/weekly fuel report) — For summary reporting.
- AF Form 1234 — Fueling unit inventory.
- Air Force e-Publishing (e-publishing.af.mil) — Central hub for all official forms and instructions.
For training, refer to your local Fuels Management Flight or Career Field Education and Training Plan (CFETP) for 2S0XX Materiel Management personnel.
Streamline Your Flightline Fuels Operations
Mastering AF Form 839 – Flightline Daily Fuels Service Log ensures your unit maintains precise fuel accountability, enhances safety, and supports seamless aircraft operations. Whether at home station or forward-deployed, consistent use of this form contributes directly to mission effectiveness.
Download the latest AF Form 839 here:
Official PDF – AF Form 839
If your unit uses automated systems (e.g., via ILS-S or fuels-specific software), combine manual logs with digital entries for redundancy. Always consult your supervisor or the latest DAFI 23-201 for unit-specific procedures.
This guide is for informational purposes and is based on publicly available U.S. Air Force publications as of 2026. Policies can update—check official sources for the most current guidance.