About VASP: Viação Aérea São Paulo S/A (São Paulo Airways), better known as VASP, was an airline with its head office in the VASP Building on the grounds of São Paulo–Congonhas Airport in São Paulo, Brazil. It had main bases at São Paulo's two major airports, São Paulo–Congonhas Airport (CGH) and São Paulo/Guarulhos International Airport (GRU).

VASP Flight 168

VASP Flight 168, a Boeing 727-212, serial number 21347, registered PP-SRK, was a scheduled passenger flight from São Paulo to Fortaleza, Brazil which, on June 8, 1982, crashed into terrain while descending into Fortaleza, killing all 137 people on board.
The crash of Flight 168 remains both the largest death toll of a Brazilian aircraft accident from the 20th century and the third-highest death toll of any aviation accident in Brazil after Gol Transportes Aéreos Flight 1907 and TAM Airlines Flight 3054

Flight History

Flight 168's first leg was from São Paulo to Rio de Janeiro, which was completed uneventfully. The flight then departed Rio de Janeiro for Fortaleza. As the flight approached its destination, it was cleared to descend from its cruising altitude of flight level 330 – approximately 33,000 feet (10,000 m) mean sea level – to 5,000 feet (1,500 m). Flying at night, with the lights of the city of Fortaleza in front, the Boeing 727 descended through its 5,000-foot (1,500 m) clearance limit, and kept descending until it crashed into a mountainside at 2,500 feet (760 m), killing all 137 on board.

Causes
-CFIT due a pilot error

AG2- Reverse Thrust
AG4- Emergency Slides
AG5- A/P
AG6- ACAS/TCAS