Interesting fact that ICAO has mandated FOQA but the FAA has not.

The 777 does have Quick Access Recorder or QAR which may provide more information than the FDR if it wasnt damaged in the crash. The QAR was missing data in the BA crash the QAR but had data the FDR did not like the position of the Fuel Metering Valves. This is why I'm not a big fan of partial information. The QAR has data that the CVR and FDR do not.