Pilot's Handbook of Aeronautical Knowledge
http://www.faa.gov/regulations_policies/handbooks_manuals/aviation/pilot_handbook/
The Pilot's Handbook of Aeronautical Knowledge provides basic knowledge that is essential for pilots. This handbook introduces pilots to the broad spectrum of knowledge that will be needed as they progress in their pilot training. Except for the Code of Federal Regulations pertinent to civil aviation, most of the knowledge areas applicable to pilot certification are presented. This handbook is useful to beginning pilots, as well as those pursuing more advanced pilot certificates.
digital - Airport/Facility Directory (d -A/FD)
http://aeronav.faa.gov/index.asp?xml=aeronav/applications/d_afd
Presented here for searching, viewing, and downloading are all the U.S. Airport/Facility Directories (A/FDs) available in PDF format files.
NACO Aeronautical Chart User's Guide
http://www.faa.gov/air_traffic/flight_info/aeronav/productcatalog/supplementalcharts/UserGuide/
The Aeronautical Chart User's Guide includes explanations of all symbology used on World Aeronautical Charts, Sectional Aeronautical Charts, Terminal Area Charts, Flyway Planning Charts, Helicopter Route Charts, Enroute Low Altitude Charts, Enroute High Altitude Charts, Area Charts, Oceanic Route Charts, Standard Terminal Arrival Routes, Standard Instrument Departures, Instrument Approach Procedures.
Federal Aviation Regulations (FARs)
http://www.faa.gov/regulations_policies/faa_regulations/
Federal Aviation Administration (FAA) governing all aviation activities in the United States. The FARs are part of Title 14 of the Code of Federal Regulations.
http://ecfr.gpoaccess.gov/ Electronic Code of Federal Regulations
Pilots, Flight & Ground Instructors
- General Operating and Flight Rules (14 CFR Part 91)
- Certification: Pilots, Flight Instructors, and Ground Instructors (14 CFR Part 61)
- Pilot Schools (14 CFR Part 141)
Aeronautical Information Manual (AIM)
http://www.faa.gov/air_traffic/publications/atpubs/aim/index.htm
The Aeronautical Information Manual (AIM) is the FAA's official guide to basic flight information and Air traffic control (ATC) procedures. The AIM contains the basic knowledge required to fly in the United States National Airspace System.
Electronic Code of Federal Regulations (e-CFR)
The Electronic Code of Federal Regulations (e-CFR) is a currently updated version of the Code of Federal Regulations (CFR). It is not an official legal edition of the CFR. The e-CFR is an editorial compilation of CFR material and Federal Register amendments produced by the National Archives and Records Administration's Office of the Federal Register (OFR) and the Government Printing Office. The OFR updates the material in the e-CFR on a daily basis.
Instrument Flying Handbook
http://www.faa.gov/regulations_policies/handbooks_manuals/aviation/
The Instrument Flying Handbook is a public domain work of the United States Government.
Supplemental Charts
http://www.faa.gov/air_traffic/flight_info/aeronav/productcatalog/supplementalcharts/
Various supplemental charts.
Federal Meteorological Handbook No. 1 - Surface Weather Observations and Reports
http://www.ofcm.gov/fmh-1/fmh1.htm
Federal Meteorological Handbook No.1, Surface Weather Observations and Reports (FMH-1) defines the observing, reporting, and coding standards for surface based meteorological reports. These standards are applicable to all Federal agency programs.