The victims' parents, Kevin and Susan Campbell, did their own research. They proved a short circuit in the wiring was the cause. The electrical glitch commanded the lock to open in flight.

Captain David Cronin successfully landed back at Honolulu International Airport . 🔍 The Investigation Investigators initially blamed ground crew error. They suspected the door was not latched properly.

Are you interested in a summary of another episode from Mayday Season 1? Mayday | Unlocking Disaster | Series 1 Episode 1

This forced a redesign of all Boeing 747 cargo door latches.

Watch the full investigative breakdown of the United Flight 811 disaster on YouTube: Mayday | Unlocking Disaster | Series 1 Episode 1 The Full Series Channel YouTube• Aug 11, 2025