Airline
Disasters Major Commerical Airline Disasters listed from 1920 to 1997
including incident reports.
Airworthiness
Directives: This link provides access to the AD's from the FAA server.
They are retrieved from the FAA on a daily basis.
Aviation
Safety Data Exchange This site is sponsored by The Experimental Aircraft
Association with data assistance from the FAA to provide a source of important
Safety Information for General Aviation, Amateur Built, and Ultralight
Aircraft.
NTSB
Accident Briefs: This link provides access to briefs from NTSB accident
reports. It also has a search engine that allows the selection of briefs
using multiple options.