Airworthiness Directives
An Airworthiness Directive (AD) contains information regarding an unsafe condition which exists in an aircraft, aircraft engine, propeller, or appliance when that condition is likely to exist or develop in other products of the same type design. Link to ADs via Landings.com

ASRS (Aviation Safety Reporting System)
The Aviation Safety Reporting System (ASRS) was established in 1975 under a Memorandum of Agreement between the Federal Aviation Administration (FAA) and the National Aeronautics and Space Administration (NASA). The ASRS collects, analyzes, and responds to voluntarily submitted aviation safety incident reports in order to lessen the likelihood of aviation accidents.

CALLBACK
NASA's Aviation Safety Reporting System monthly safety bulletin. A staff pilot acts as an aviation safety analyst and publishes portions of actual ASRS Report Submissions to illustrate an intended subject of aviation safety.

DTIC
Defense Technical Information Center (DTIC)'s Scientific and Technical Information Network (STINET) Service helps the Department Of Defense community access pertinent scientific and technical information to meet mission needs effectively.

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FAA (FEDERAL AVIATION ADMINISTRATION)
The FAA is the U.S. government agency primarily responsible for the safety of civil aviation.

FAA Aerospace Forecasts
Forcast tables for the years up to 2017. Tables include commercial and regional carriers.

Flight Standards Service Home Page
The FAA Flight Standards Service (AFS) home page provides Aviation Safety Information and links to other FAA and U.S. Government aviation information locations on the Internet.

IFFDP (International Flight Folder Documentation Program)
The AWC (Aviation Weather Center) provides meteorological flight documentation at specified airports within the United States, its territories and possessions. The flight folder consists of wind and temperature aloft forecast charts; significant weather charts (with abbreviated plain language descriptions of forecasts as appropriate) and much more.

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NASA
Homepage for the National Aeronautics and Space Administration.

NASA Langley Research Center
NASA Aviation information

NOAA (National Oceanic and Atmospheric Administration)
NOAA's mission is to describe and predict changes in the Earth's environment, and conserve and wisely manage the Nation's coastal and marine resources. This page gives direct access to U.S. Official Weather Forecasts.

NTIS
National Technical Information Service is U.S. government-sponsored research and worldwide scientific, technical, engineering, and business-related information.  Full-text.

NTSB (National Transportation Safety Board -Aviation)
The National Transportation Safety Board is an independent Federal agency that investigates every civil aviation accident in the U.S. and significant accidents in other modes of transportation -- railroad, highway, marine and pipeline -- and issues safety recommendations aimed at preventing future accidents. This link focuses on aviation.

NWS (National Weather Service)
The National Weather Service (NWS) provides weather, hydrologic, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy. This page gives direct access to U.S. Official Weather Forecasts.

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Purdue Libraries Government Page
Purdue Libraries have extensive collections of U.S. Government publications available in paper, microfiche, and various electronic formats. Government publications are distributed to various school and departmental libraries on campus and many are accessible through the libraries online catalog THOR.

TCDS (Type Certificate Data Sheets)
Type Certificates show the conditions and limitations of aircraft operation. Listed by aircraft catagories.

TRIS
U.S. Department of Transportation’s National Transportation Library. Search the TRB Research in Progress (RIP) Database for current research projects Search the International Transport Research Documentation (ITRD) Database for international material. Search the TLCat - Transportation Libraries Catalog for transportation-related books and other materials held in government, university and other transportation libraries. Search the National Technical Information Service Database for government-funded documents published since 1990.

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