Read all 522 pages of this official FAA handbook online, free, or download the PDF (74 MB).
The Pilot's Handbook of Aeronautical Knowledge is the FAA's core reference for airplane pilots. Nearly every Aviator IQ pilot exam draws on it, from Part 107 through ATP, which is why it carries more citations across the bank than any other document.
A section-by-section map of FAA-H-8083-25. Every topic below is something the exams built on this source can ask about, and on Aviator IQ each of those questions carries a verbatim quote from this document, so you can trace an answer straight back to the page it came from.
01Principles of flight and aerodynamicsThe four forces, angle of attack and the critical angle, how lift and drag are produced, and the stability that keeps an airplane flying hands-off. The stall material here anchors dozens of questions.
02Aircraft structure and flight controlsThe major components, the primary controls and the three axes they move about, and the secondary controls: flaps, trim, and spoilers, including adverse yaw and how the rudder answers it.
03Aircraft systemsThe reciprocating engine, ignition, fuel, electrical, vacuum, and propeller systems, plus how each one fails and what the pilot sees when it does.
04Flight instrumentsThe pitot-static and gyroscopic instruments, the magnetic compass and its turning and acceleration errors, and partial-panel flying after an instrument fails.
05Weather theory and servicesThe atmosphere, air masses and fronts, thunderstorms, icing, and fog, then how to obtain a briefing and decode a METAR, TAF, and the aloft forecasts.
06Airport operationsRunway and taxiway markings, airport signs and lighting, the traffic pattern, and radio and light-gun communication at towered and non-towered fields.
07NavigationPilotage and dead reckoning, the effect of wind, VOR and GPS, magnetic variation and deviation, and reading the sectional chart and Chart Supplement.
08Aeromedical factors and ADMHypoxia, hyperventilation, spatial disorientation and the sensory illusions, plus the decision-making and risk-management models the ACS now tests directly.
09Aircraft performance and weight and balanceDensity altitude and its effect on takeoff and climb, reading the performance charts, and computing center of gravity from arms and moments.
Why Aviator IQ cites this source
Pilot's Handbook of Aeronautical Knowledge is a US government public-domain document. Every Aviator IQ question that draws on it stores the exact sentence it tests and checks that quote against this edition (FAA-H-8083-25C (2023), incl. MOSAIC addendum (October 2025)), last verified October 2026. If the FAA reissues it, the citing questions are pulled for review before the new edition ships.
