There are many free online resources available at your fingertips. Maybe you aren’t quite ready to make the leap and spend any money yet. Maybe you have started your training, which has drained out your bank account. Maybe you are just trying to get as much of the knowledge and information as cheap as possible, so you want to use all available free resources before spending money on other resources. Whatever your reason, free resources are always a good option. Below I have included a list of free online resources for you. I suggest checking them all out.
Free Online Pilot Resources
FAA Handbooks
Pilot’s Handbook of Aeronautical Knowledge (FAA-H-8083-25B)
Airplane Flying Handbook (FAA-H-8083-3C)
Aerodynamics for Navy Aviators
Aeronautical Chart User’s Guide
Aeronautical Information Manual
Weight & Balance Handbook (FAA-H-8083-1B)
Instrument Procedures Handbook
Plane Sense – General Aviation Information
FAA Resources
Federal Aviation Regulations (FARs)
Airworthiness Directives Manual
Temporary Flight Restrictions (TFRs)
Airworthiness Directives (ADs)
Sample Airman Knowledge Test Questions
FAA Aeromedical Safety Brochures
Aviation Safety Courses for Civil Aviation Pilots
FAA MedXPress Program for Pilots
Acceleration in Aviation: G-Force
Alcohol and Flying: A Deadly Combination
Altitude-Induced Decompression Sickness
Carbon Monoxide: A Deadly Menace
Circadian Rhythm Disruption and Flying
Airman Certification Standards
I have included a video to help explain how to use the ACS. Below that, I linked the ACS for each certificate.
Private Pilot - Airplane Airman Certification Standards (FAA-S-ACS-6B)
Instrument Rating Airman Certification Standards (FAA-S-ACS-8B)
Commercial Pilot — Airplane Airman Certification Standards (FAA-S-ACS-7A)
Airline Transport Pilot and Type Rating for Airplane Airman Certification Standards (FAA-S-ACS-11)