OEM’s
Bell Helicopters
Sikorsky
Eurocopter

Associations
American Helicopter Society International
Helicopter Association of Canada
Helicopter Association International
The International Association of Chiefs of Police

US Federal Government Agencies
FAA Home
FAA Advisory Circulars
FAA Airworthiness Directives
FAA Type Certificate Data Sheets

Canadian Federal Government Agencies
Transport Canada
Transport Canada Airworthiness Directives

Publications
Helicopters Magazine (Canada)
Rotorhub.com (UK)
Vertical Magazine (Canada)

Before you buy a used aircraft, you can check and see if it has been in
an accident. Are you interested in the worldwide accident history of a
particular helicopter? Are you considering buying, selling, insuring,
using, or trading an aircraft? Here are some good web sites to visit
first. These web sites have some extensive information on aviation
accidents:

Accident Investigation Bureaus around the World
Australia: Australian Transport Safety Bureau (ATSB) 
Brazil: Accidents Investigation and Prevention Center (CENIPA)
Canada: Transportation Safety Board (TSB)
Denmark: Aircraft Accident Investigation Board (AAIB)
Finland: Accident Investigation Board (AIB)
France: Bureau Enquêtes-Accidents (BEA)
Germany: Federal Bureau of Aircraft Accidents Investigation (BFU)
Iceland: Aircraft Accident Investigation Board (RNF)
Ireland: Air Accident Investigation Unit (AAIU)
Japan: Aircraft and Railway Accidents Investigation Commission (ARAIC)
New Zealand: Transport Accident Investigation Commission (TAIC)
Sweden: Board of Accident Investigation (SHK) 
Switzerland: Aircraft Accident Investigation Bureau (AAIB)
Taiwan: Aviation Safety Council (ASC)
United Kingdom: Air Accidents Investigation Branch (AAIB)
United States: National Transportation Safety Board

If you need additional information, please contact RotorLink Technical
Services with the aircraft identification serial number. You might be
surprised where the aircraft data plate has been!