![]() ![]() The UN International Civil Aviation Organization (ICAO), recommended the installation of GPWS in 1979. National Transportation Safety Board (NTSB), in 1974, the FAA required all large turbine and turbojet airplanes to install TSO-approved GPWS equipment. As a result of these studies and recommendations from the U.S. Findings from these studies indicated that many such accidents could have been avoided if a warning device called a ground proximity warning system (GPWS) had been used. īeginning in the early 1970s, a number of studies examined the occurrence of CFIT accidents. A CFIT accident is one where a properly functioning airplane under the control of a fully qualified and certified crew is flown into terrain, water or obstacles with no apparent awareness on the part of the crew. In the late 1960s, a series of controlled flight into terrain (CFIT) accidents took the lives of hundreds of people. ![]() ![]() Main article: Terrain awareness warning system § History ![]()
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