I doubt whether anyone can prove that General Electric or Boeing were at fault. It has been suggested that certain parties knew the condition of the engine, but this is pure speculation. In which case it may take decades to sort out. I bet some have gone under the guise of a 'no win no fee' basis.
A quote from Reuters
"Our clients are not critical of BA and feel that the pilots and cabin crew performed heroically in guiding the aircraft to an emergency stop, and then evacuating all occupants away from the burning aircraft in difficult circumstances," Healy-Pratt said in the statement.
I wonder what the difficult circumstances were? Pax taking hand baggage and impeding an evacuation?
The full story.
Passengers on BA jet that caught fire in Las Vegas sue Boeing, GE | Reuters