Attendees listen as Boeing Co. and Alaska Airlines leadership speak in front of an Alaska Airlines Boeing Co. 737-9 aircraft during an event to showcase the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergAir sampling probes for greenhouse gas detection, installed in collaboration with the National Oceanic and Atmospheric Administration, are seen inside an Alaska Airlines Boeing Co. 737-9 aircraft during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technolofgies. Photographer: David Ryder/BloombergDiana Birkett Rakow, vice president of public affairs and sustainability at Alaska Airlines, wears a company pin during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergDiana Birkett Rakow, vice president of public affairs and sustainability at Alaska Airlines, speaks to reporters during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergDiana Birkett Rakow, vice president of public affairs and sustainability at Alaska Airlines, speaks during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergThe exterior of an Alaska Airlines Boeing Co. 737-9 aircraft is seen parked during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergA low profile anti-collision light blinks amidst nature-themed artwork on the exterior of an Alaska Airlines Boeing Co. 737-9 aircraft during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergAn ecoDemonstrator logo is seen on the exterior of an Alaska Airlines Boeing Co. 737-9 aircraft during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergThe interior of an Alaska Airlines Boeing Co. 737-9 aircraft is seen during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergMike Sinnett, vice president and general manager of product development at Boeing Commercial Airplanes, speaks with reporters during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergTouchscreen controls are seen inside the cockpit of an Alaska Airlines Boeing Co. 737-9 aircraft during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/BloombergA sign welcomes visitors during a tour with Rae Lutters, Boeing Co.’s ecoDemonstrator program manager, aboard an Alaska Airlines Boeing Co. 737-9 aircraft during an event showcasing the latest updates in the ecoDemonstrator program at Boeing Field in Seattle, Washington, U.S., on Monday, September 27, 2021. The ecoDemonstrator program has created eight commercial airplanes since 2012 to test new technologies. Photographer: David Ryder/Bloomberg