the 777 FDR & CVR breakers are downstairs in the EE bay, unlike in earlier Boeing aircraft
How does that impact the investigation? Just curious. i.e. whether circuit breakers were deliberately triggered or automatically triggered due to an another technical incident for some reason. The end effect in terms of aircraft performance resulting from the disabled function is surely going to be the same, notwithstanding the effect on the aircraft of other factors that might have triggered them.