A Boeing 737 and an Embraer 600 collide in mid-air, killing 154 people and triggering a Brazilian aviation crisis.

On 29 September 2006, Gol Transportes Aéreos Flight 1907, a Boeing 737-800 on a scheduled domestic passenger flight from Manaus, Brazil, to Brasília and Rio de Janeiro, collided mid-air with an Embraer Legacy 600 business jet flying on an opposite heading over the Brazilian state of Mato Grosso. The winglet of the Legacy sliced off about half of the 737's left wing causing the 737 to break up and crash into an area of dense jungle, killing all 154 passengers and crew on board. Despite sustaining serious damage to its left wing and tail, the Legacy landed with its seven occupants uninjured.

Between 2006 and 2007, Brazil's civil aviation sector suffered a crisis characterized by significant flight delays and cancellations, air traffic controller strikes and safety concerns about the country's airport and air traffic infrastructure. It ostensibly started after the crash of Gol Transportes Aéreos Flight 1907 in September 2006, and extended to January 2008. While the government announced a series of measures aimed at mitigating its effects, no clear solution has been found. In Brazil the crisis has been dubbed "Apagão Aéreo", an allusion to an energy crisis which Brazil experienced between 2001 and 2002.

September 29 is the 272nd day of the year in the Gregorian calendar; 93 days remain until the end of the year.