RE:
For such a new aircraft (that, I guess, must be under some kind of warranty) is there actually an exchange of maintenance information happening between the airline and Boeing in a (real-)timely manner?
Or does Boeing usually not get to know what problems have occurred and (hopefully) been fixed by the airline's staff, even if it's a recently delivered airplane?
I worked in a Middle Eastern airline which had only 2 score aircraft but started a Defect Control Dept in late 1970's; each departure station would SITA telex the defects to base and these would be reviewed by a senior engineer and advice to Maintenance, they were also loaded into a very basic ATA program which would show on a measles chart repeat entries for investigation (the most frequent being ATA38, bogs basins). Each morning the Boeing and Pratt & Whitney rep would take note of the problems 1st hand from the hand written cardex system; when we joined up with an American Operator, we had a live link through dedicated SITA line to their Maintenance system; when ETOPS arrived this department was further tuned. With LION Air having over 100 Boeing's one would hope they have a monitoring Dept; it is likely that whilst the days of most resident Reps have gone by way of the bean counters exit route, there is now both ACARS and internet and surely manufacturers have similar access to relevant data from such a major airlines but then can only act bi laterally not instantaneously.