Fuel Planning & Requirements
Fuel Planning & Requirements is a core knowledge area on the Aircraft Dispatcher FAA written exam. This hub collects our 7 in-depth, ACS-aligned fuel planning & requirements articles — each written in plain English and grounded in the official FAA handbooks. Work through them below, then drill the topic with practice questions.
Domestic Fuel Requirements Under 14 CFR 121.639
How much fuel a Part 121 domestic flight must carry under 14 CFR 121.639 — enough to reach the destination, fly to the alternate, and hold 45 minutes.
Flag and International Fuel Reserve Requirements Under 14 CFR 121.645
Flag and international operations under 14 CFR 121.645 require dispatchers to plan fuel loads covering the destination, an alternate, and a mandatory reserve — with specific rules differing from domestic ops.
Supplemental Operations Fuel Requirements Under 14 CFR 121.643
Under 14 CFR 121.643, supplemental air carriers must carry enough fuel to complete the planned flight plus required reserves, accounting for alternates, weather, and ATC contingencies before each departure.
Calculating Contingency, Alternate, and Final Reserve Fuel for a Release
Aircraft dispatchers must methodically calculate contingency, alternate, and final reserve fuel to legally release a flight under 14 CFR Part 121, ensuring the aircraft carries enough fuel for every foreseeable deviation from the planned route or destination.
Redispatch and Reclearance Fuel Strategy for Long-Range Flights
Redispatch and reclearance fuel strategies allow Part 121 operators to extend long-range flight capabilities by legally reducing departure fuel loads through planned en route replanning at intermediate decision points.
Tankering Fuel: Economics and Performance Trade-Offs for the Dispatcher
Tankering fuel means deliberately carrying extra fuel beyond what regulations require to avoid purchasing it at a more expensive destination, but the extra weight always costs performance and burns some of what you saved—dispatchers must master the math to decide when it truly pays.
Fuel Freeze Point and Cold-Soak Considerations on Polar and High-Altitude Routes
Fuel freeze point and cold-soak effects pose critical safety risks on polar and high-altitude routes; dispatchers must ensure planned fuel temperatures remain well above the fuel's freeze point throughout the flight.
More Aircraft Dispatcher subjects
Articles are original summaries grounded in the public-domain FAA handbooks and cite their source. ACS-aligned study aids — not a substitute for the official handbooks or regulations.