Pilot's Handbook of Aeronautical Knowledge

About This Book

The Pilot's Handbook of Aeronautical Knowledge (PHAK) is the FAA's foundational text for all student pilots. It provides the essential aeronautical knowledge base required for pilot certification and serves as an invaluable reference throughout a pilot's career.

Covering everything from the principles of flight and aircraft systems to weather theory, navigation, and aeromedical factors, the PHAK gives pilots the theoretical framework they need to understand what happens in the cockpit and why. It is the starting point for every FAA written exam and the backbone of any ground school curriculum.

Chapter Breakdown

Ch. 1-2

Introduction to Flying & Aeronautical Decision-Making

History of aviation from the Wright brothers through the modern FAA regulatory system. Certificate types and the medical certificate hierarchy. The ADM cycle: Identify, Assess, Select, Implement, Evaluate. Introduces hazardous attitudes (Anti-authority, Impulsivity, Invulnerability, Macho, Resignation) and their antidotes. Situational awareness and automation dependency.

Ch. 3-4

Aircraft Structure & Principles of Flight

Fuselage categories (truss, monocoque, semi-monocoque), wing types and control surfaces. The four forces (lift, drag, thrust, weight) and their equilibrium in level flight. Bernoulli's theorem, Newtonian reaction, Angle of Attack (AoA), Chord Line, relative wind. Parasite drag (varies with V²) vs. induced drag (varies inversely with V²). Load factor formula: n = 1/cos(bank angle). Stall speed increases with bank: Vs_banked = Vs × √n.

Ch. 5-6

Flight Controls & Aircraft Systems

Primary controls (aileron, elevator, rudder) and secondary controls (flaps, trim tabs, spoilers). Adverse yaw and differential aileron deflection. High-lift devices: plain, split, slotted, Fowler, slotted-Fowler flaps. Powerplant types: opposed engines, turboprop configurations. Fuel systems, oil systems, electrical systems, vacuum/pressure systems for gyroscopic instruments.

Ch. 7-8

Flight Instruments

Pitot-static system: airspeed indicator (IAS/CAS/EAS/TAS), altimeter, VSI. Gyroscopic instruments: attitude indicator, heading indicator, turn coordinator. Magnetic compass: VDMONA errors (Variation, Deviation, Magnetic Dip, Oscillation, Northerly Turning Error, Acceleration errors). The ANDS rule: Accelerate North Decelerate South. Glass cockpit PFD/MFD architecture.

Ch. 9-11

Weight & Balance, Aircraft Performance

CG calculation using the moment arm formula. UNOS rule: Up-nose, opposite side for arm shift. Density altitude and its effect on engine output and airfoil lift. Standard lapse rates: ISA = 15°C at sea level, −2°C/1,000 ft. Performance charts: takeoff ground roll, accelerate-stop distance, climb performance, landing distance. Effects of pressure altitude, temperature, humidity, and runway slope.

Ch. 12-13

Weather Theory & Aviation Weather Services

Atmospheric layers, temperature inversions, adiabatic lapse rates. Frontal systems: cold front (steep, fast), warm front (gradual, wide precipitation), stationary, occluded. Thunderstorm life cycle: cumulus, mature (most severe), dissipating. Icing types: rime (rough), clear (heavy), mixed. Weather products: standard briefing sources, METAR, TAF, SIGMET, AIRMET, PIREPs.

Ch. 14-16

Airspace, Navigation & Flight Planning

Class A (FL180-FL600, IFR only), B (major airports, 30 NM veil), C (approach control), D (tower), E (controlled, various floors), G (uncontrolled). Special use airspace: Prohibited, Restricted, Warning, Military Operating Areas. VFR cruising altitudes: odd thousands + 500 ft (0-179°), even thousands + 500 ft (180-359°). Dead reckoning, pilotage, VOR, GPS. E6B computer: groundspeed, wind correction angle, fuel burn.

Ch. 17

Aeromedical Factors

Hypoxia: time of useful consciousness (TUC) decreases with altitude. Hyperventilation: treatment is to breathe into bag or talk. IMSAFE checklist: Illness, Medication, Stress, Alcohol (8-hr bottle-to-throttle, 0.04% BAC limit), Fatigue, Emotion. Spatial disorientation: the Leans, Graveyard Spiral, somatogravic illusion. Vision: night adaptation requires 30 min, focus 10-15° off-center for night.

Key Formulas & Rules

Load Factor: n = 1 / cos(bank angle)

At 60° bank, n = 2.0 Gs. Stall speed increases as √n, so at 60° bank the aircraft stalls at √2 × Vs (about 41% higher than wings-level stall speed).
Compass Errors: VDMONA

Variation, Deviation, Magnetic dip, Oscillation, Northerly turning error, Acceleration error. Turning: compass leads in south, lags in north. Acceleration: compass indicates a turn north; deceleration indicates a turn south (ANDS rule).
Weight-Shift Formula

Weight change × (new station − old station) = Total weight × CG shift. Use UNOS to verify direction: shifting weight Up moves the nose up (aft CG), shifting weight to the Opposite side of the imbalance restores balance.
VFR Cruising Altitudes

Magnetic course 0–179°: odd thousands + 500 ft (3,500 / 5,500 / 7,500). Magnetic course 180–359°: even thousands + 500 ft (4,500 / 6,500 / 8,500). Applies at and above 3,000 ft AGL in uncontrolled airspace.

Who Should Read It

This handbook is essential for all student pilots studying for the FAA Private Pilot Knowledge Test. It is also an excellent refresher for certificated pilots and a reference for instrument and commercial candidates. The FAA provides it as a free download, making it accessible to every aspiring pilot worldwide.

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