FlightPathOBN
The test flight is a 'nominal' baseline exercise.
The FAA has egg all over its face from its original certification, they will be
ensuring with their new brought in experts that everything is checked out and double checked and that all recommended certification tests are totally and painstakingly carried out with all results as expected.
Boeing also with its new brought in experts
MUST ensure not only that the aircraft passes these re-certification tests but also that there is no other battery problem in the next several years - or the company would be in a company threatening situation.
I am surprised at the number of people commenting that do not realize that for both FAA and Boeing it is
essential that this testing is thorough and completely correctly carried out to the latest standards. There will be no skimping, clever dodges or short cuts for this certification testing, as one or the other or both of FAA and Boeing would really have problems if the aircraft are re-released to fly and another battery issue is found.