Update from my earlier post. Avianca has finally taken possession of its first 787 yesterday. The aircraft ZA665 (LN 217, N780AV) was reported at the Everett Delivery Center by sources. This indicates that the aircraft is due to depart from Everett soon.
This aircraft had a very long gestation period at Everett spending over 6 months from the start of final assembly to delivery at Everett. It is suspected that there were seat issues but also financing issues that held up delivery. Avianca is expected to take three more 787s before the end of the month.