In the face of the documented problems and NTSB warnings, how is the 777 able to maintain its ETOPS rating?
ETOPs is based on the assumption of independent failures of the engines.like a turbine and a FADEC
EROPs includes all engine combinations including Quads and dependent failures like ice
I'm far more concerned abot fleet statistics impacting EROPs than ETOPs
but I'll leave that to the statiticians to ponder