LN005 evidently needs far too much work to make it deliverable (even as a green frame to an outfitter) and I am guessing LN004 also would need significant refurbishment and perhaps even a maintenance check (though they could do that at the same time).
LN5 had begun the rework process, but only to the extent of removing components that needed replacement or modification. It's now in a somewhat stripped state. LN4, while still flyable, had not undergone any work at all. As I said in the other thread, I wonder if Boeing might benefit from keeping it around as a R&D/test aircraft, the way Airbus does. Rumor on Twitter has it that LN 4 will be donated like the first three frames, though.
Back in 2013, 4 frames were assigned for Transaero
When they dropped order, 3 of them had been undergoing re-work (LN11, LN14 and LN22), LN5 begun re-work in October 2013 and work was going on until January when Transaero cancelled deal. Boeing had 3 frames in EMC without customer, and LN11 was the most advanced in process. Later LN11 was assigned as ZA841 for Korean Air and LN5 pulled out of the EMC, mothballed and moved to storage. LN14 and LN22 re-work pace was slowed down to minimum and put on hold when traveled work issue popped out. Meanwhile Boeing lost customer for another 5 terrible teens - Lion Air cancelled order too.
LN11 finished re-work in late October 2014, but delivery was postponed to end of March 2015. Greenpoint Technologies started outfitting of LN11 in August 2015 - right on time, when LN5 would be originally re-worked and delivered.
I have a feeling those orders might have been for LN 4 and 5 -- but Boeing might have come to the conclusion that, accounting for the PR benefit of the ability to write off some DPCs without really saying so, and the likely more profitable/less troublesome support for standard frames, it was more financially attractive to build two more 787-8 frames for 2018 delivery than to rework the two test frames. Or, one of the frames might now be LN 19, which is undergoing active rework despite not currently having a customer.
These 2 frames were indeed assigned with BBJ as customer in Boeing's firing order system.
I agree that Boeing written off them due to cost - either lower sell price than re-work bill or building new frames would be more profitable for Boeing. I'm sure that many parts of LN5 are already sold as spares, she had GEnx-1B PIP2 engines so they are probably sold long time ago.