ATA Specification 123, Revision 2015.1, provides a practical framework for accounting for jet fuel inventory in aviation fuel systems. The document covers fuel receipts, into-plane disbursements, defuels, sump fuel, inventory reconciliation, temperature corrections, physical inventory reporting, net calculated inventory, record retention, and related terminology.
It includes operating instructions for using the Spec 123 and Harmonization spreadsheet tools to convert gross gallons to net corrected gallons, reconcile inventory variances, track temperature effects, and support monthly reporting. The guidance is intended for airlines, airport fuel system operators, fueling companies, fuel inventory position holders, and aviation fuel accounting or audit personnel.
Application Scope: Use for internal aviation fuel inventory accounting, reconciliation, reporting, and operational control at commercial airports and associated fuel storage and dispensing facilities.
