Part 9/10:

In the aftermath, investigations revealed that this tragic incident stemmed from structural faults with the aircraft's cargo door locking mechanism. Ground crew mishandling had initially been blamed; however, the Campbell family, parents of one missing victim, conducted their own investigation and discovered a design flaw that had plagued Boeing 747s for years.

The National Transportation Safety Board officially concluded that faulty wiring in the locking mechanism was the cause of the cargo door failure that led to the explosion, prompting necessary changes to enhance safety regulations for all existing Boeing 747s flying thereafter.