What happened
During a final approach to Congonhas Airport, the flight crew encountered significantly reduced visibility due to nighttime and foggy weather. The aircraft failed to reach the runway threshold, impacting the ground several hundred meters short of the landing strip. The collision generated a massive explosion, and the airframe was destroyed by the force of the impact and subsequent post-crash fire. All 18 occupants were killed in the accident.
Findings
The source material does not provide specific technical findings or contributing factors beyond the environmental conditions present at the time of the crash.