Brazilian Plane Crash Investigation Reveals Critical Moments Before Impact

Black box data shows pilots struggled with altitude loss and power issues before the fatal crash that killed 62 people.

Investigators have retrieved the black box but its contents don't clarify the crash's cause.
Pilots noticed a steep loss of altitude one minute before the crash and called for more power.
The aircraft, an ATR-72, spiraled out of control and crashed near São Paulo, killing all on board.
No emergency or adverse weather conditions were reported by the pilots before the crash.
Experts speculate that icing on the plane's wings may have contributed to the accident.