In the aftermath of the January 25 , 1990 crash of Avianca flight 52 on Long Island , New York , questions emerged about how the FAA conducted safety oversight of foreign air carriers flying into the United States . In response , the FAA established the IASA program in 1992 . Following an IASA audit , a country is assigned one of two ratings : Carriers from Category 2 countries are allowed to continue operating to the United States as before the assessment , but are not allowed to expand their service to the USA or codeshare with US carriers . Additionally , such carriers may be subject to heightened ramp inspections
Avianca flight 52
Avianca Flight 52
International Aviation Safety Assessment Program