What happened
On January 12, 2009, at 1545 UTC, a Boeing 737-73V, operating as G-EZJK, underwent a violent pitch-down motion while in flight over East Anglia, UK. During this event, the aircraft's maximum operating speed (Vmo) was exceeded by 100 knots, and the plane lost 10,000 feet of altitude.
The aircraft, operated by easyJet, was carrying 4 flight crewmembers and no passengers. The crew successfully recovered the aircraft from the maneuver, and it landed safely. There were no injuries to the flight crew.