Flight support glossary

A DoD fuel transaction document used to capture the point-of-sale information associated with aviation fuel purchases and sales. Under AFI 11-253 it may be used by commercial merchants to document fuel transactions, and both the merchant and the aircrew member certify that the document accurately represents the purchase. Copies of completed DD Form 1898s and vendor receipts are retained with the AF IMT Form 664.

Source: Defense Logistics Agency · Handled in FTPM

The official DoD document used to record fuel transferred during in-flight and aerial refueling. It captures the tanker mission, tanker aircraft, receiver aircraft, command or unit, fuel grade and quantity issued. Current AFI 11-253 requires enough information on the DD Form 791 to allow the providing tanker unit to identify and bill the correct receiving unit, service or country.

Source: ESD · Handled in FIPM, FSP Mobile

The Air Force source document for recording and reporting operational flight and training-device information. It is the primary record of both personnel flying hours and aerospace vehicle flying hours, and is also used as the official record supporting flight-pay eligibility. Completion is generally a joint responsibility of maintenance personnel and the pilot in command.

Source: E-Publishing · Handled in SRP, FHPM

Current AFI 11-253 refers to this as AF IMT Form 664. It documents and retains supporting records for fuel and authorized ancillary-service transactions occurring away from the aircraft's home station. Receipts and DD Form 1898 documentation are placed with it. For aerial refueling, the AF IMT 664 also serves as the source document and receipt for the receiving aircrew.

Source: E-Publishing · Handled in FLPM, FTPM, FSP Mobile

Previously AFI 21-103. The current publication is DAFI 21-103, 1 November 2022, incorporating Change 1, 23 July 2025. It establishes Department of the Air Force requirements for inventory, status and utilization reporting, and provides guidance for management of the mission-essential systems and equipment collectively referred to as weapon systems. This includes aerospace vehicle inventory, possession, maintenance status, utilization and Flying Hour Program reporting.

Source: E-Publishing · Handled in FHPM, SRP

The primary Air Force instruction governing aviation fuel purchasing, authorized ancillary ground services, AIR Card management, accountability, reconciliation and in-flight-refueling secondary sales. The current edition is dated 16 December 2025. It establishes accountability requirements for the purchase and sale of into-plane aviation fuel and off-station services, and defines responsibilities from HAF and MAJCOM through Wing, Accountable Official or WRDCO and aircrew levels.

Source: E-Publishing · Handled in FTPM, FIPM

A revolving fund in which operating activities provide goods or services to customers, collect reimbursement for those goods and services, and use the revenue to finance continuing operations. DoD working capital fund activities are generally designed to recover their costs rather than operate for profit. In the aviation-fuel process, AFI 11-253 states that DLA, through the Defense Working Capital Fund, initially pays for aviation fuel used by the Air Force and then bills the appropriate Air Force unit. It separately defines the Transportation Working Capital Fund (TWCF) as a revolving fund that permits prompt payment for DoD aircraft fuel purchases and is subsequently reimbursed by the using organization.

Source: Office of the Under Secretary of War · Handled in FFPM