Lauda Air Flight 004

Lauda Air Flight 004 was a commercial flight that crashed in 1991 due to a serious mechanical failure involving the aircraft's thrust reverser systems. During the flight, the reverse thrust mechanism deployed unexpectedly in mid-air, causing the plane to become uncontrollable and resulting in an in-flight breakup. All 223 passengers and crew aboard were killed. The accident highlighted the importance of rigorous maintenance and safety protocols for aircraft systems, and led to changes in aircraft design and operational procedures to prevent similar incidents from occurring again.