Taxiing over to the West Pads as BOE212 this afternoon is Boeing's latest "ecoDemonstrator" aircraft. Allegedly here for some autonomous taxi tests. They did a few laps around the pads before heading back to Paine Field in the late afternoon.

Delivered to Singapore Airlines on November 26, 2002, Boeing bought this 777 (N817BC) after it's last revenue flight with Singapore on March 1, 2018. Later registered N943BC between leases to Air New Zealand (ZK-OKI May 2018 - March 2019) and Surinam Airways (PZ-TCU November 2019 - January 2022). Refurbished and the passenger interior stripped for test equipment, the aircraft was painted for Boeing's ten year old ecoDemonstrator program. It will test some 30 new technologies with partners to improve airline efficiency.