The FAA did not ground this aircraft. JAL and ANA did. There were only six 787s in service in the FAA jurisdiction, and these were flying domestic routes.
The FAA is a short tail on a big dog.....
This was merely a new iteration of what has become an ad hoc engineering feat.
The self grounding airplane.
What a miracle, airplanes that tell us, non fatally, what is wrong. Faulty tubesheet on the TRENT 7? Cracked ribs on the 380? Bogus oil fittings? Misplaced tools? Engines that vomit nickel on taxi?
Fuel gush, rippling plastic, keystone cop evacs on the taxi way? Forty minute fuselage fires?
Toyota can turn gasoline into electricity millions of times an hour, worldwide, but Boeing has problems turning kerosene into sparky without starting fires?
And Boeing does not use the electrics for propulsion.
Not rocket science.
Amazing.