SeattlePI.com, "GOL 737 crash update -- Crew Error May Have Led to Crash: NTSB report"
The NTSB, in a letter Wednesday to the Federal Aviation Administration, said pilots need to be aware about the circumstances of the mid-air collision in April between a Boeing 737-800 operated by Brazil's Gol airlines, and an Embraer legacy 600 business jet. All 154 people on the 737 were killed. The other plane was able to land despite damage.
The pilots of the business jet apparently were not aware that the jet's transponder was set to STANDBY mode and in this mode it was not transmitting data. This meant the jet's collision avoidance system, TCAS, could not display vital information that would have alerted the pilots that the Gol 737 was headed their way.
