On January 17, 2008, at 1243 hours, a British Airways Boeing 777-236ER landed short of Runway 27L at London Heathrow Airport. Work has continued on all fronts to identify why neither engine responded to throttle lever inputs during the final approach, according to the NTSB.

While the aircraft was stabilized on approach with the autopilot engaged, the autothrust system commanded an increase in thrust from both engines. Both engines initially responded, but after about 3 seconds, the right engine’s thrust decreased. Some eight seconds later, the thrust on the left engine was ...