Valujet was one of the generation of new discount airlines that sprang up as the result of airline deregulation in the 1980's. Based in Atlanta, it offered cheap fares to Florida and other popular destinations. Its cost savings were achieved in part by hiring other companies to perform many of the routine operations that keep an airline flying. Many major airlines perform aircraft maintenance themselves, work that Valujet hired a company called SabreTech to do. One of the jobs that SabreTech had been hired to perform for Valujet was the routine task of replacing oxygen-generator canisters in some of its DC-9's. In 1996 one of Valujet's DC-9's crashed into the Everglades killing all 110 people on board. It was later determined that the cause of the crash centered around the treatment of the oxygen-generator canisters by Valujet and SabreTech employees.
Fledderman, C.B. Engineering Ethics. New Jersey, Prentice Hall, 1999.