Aviation Safety: Better Data and Targeted FAA Efforts Needed to Identify and Address Safety Issues of Small Air Cargo Carriers, Report to Congressional Requesters [open pdf - 2MB]
The Government Accountability Office's, "congressionally requested study addresses (1) recent trends in air cargo safety, (2) factors that have contributed to air cargo accidents, (3) federal government and industry efforts to improve air cargo safety and experts' views on the effectiveness of these efforts, and (4) experts' views on further improving air cargo safety. To perform the study, GAO analyzed agency data, surveyed a panel of experts, reviewed industry and government documents, and interviewed industry and government officials. GAO also conducted site visits to Alaska, Ohio, and Texas."
Government Accountability Office: http://www.gao.gov/