Since the loss of Swissair Flight 111 on September 2, 1998, the FAA started to look closer at aircraft modifications and the respective documentation, with a focus on the ICAs. While the FARs have always required ICAs, enforcement had been limited to new Type Certificates. After this tragic loss of life, the FAA began to look closer at ICAs for interior modifications. Then came the investigation report after the loss of TWA Flight 800 July 17, 1996 which found no evidence of a terrorist attack. These two horrific accidents put the whole topic of Instructions for Continued Airworthiness front and center for the FAA.