The nightmare liner, reminds me of a old song.
It is currently a ugly duckling and one day it will develop into a beautiful Swan.
This aircraft is having technical issues with every airline operating it and if each one was reported by the BBC or here on Prune it would be never ending.
The high number of components being replaced and the issues being found which result in Boeing QA having to take action is a alarming.
My guess is, all operators have been asked to remove both the main and APU batteries, inspect them and reinstall as per the AMM. This also makes sure they have been installed correctly.
A number of us that have knowledge of the day to day operation of this aircraft, are very happy that our own Airline cancelled its order.
I am confident that Boeing and its partners (Vendors) will end up with a great product, but l fear it is going to takes years and not months to achieve.