N921DU

This airframe, registered as N921DU, is a Boeing 737-900ER (737-932ER) built in 2019 with manufacturer's serial number 63532. The aircraft is owned and operated by Delta Air Lines Inc of Atlanta, GA, US, and is registered in the US. Delivered new to Delta in 2019, the airframe has remained with the same corporate operator since build, and carries the typical fleet management history of a mainline carrier including scheduled heavy maintenance and line checks under Delta's maintenance program. Valuation and public condition reports for this specific tail are not published.

The aircraft is outfitted in Delta's approximately 180-seat mixed cabin layout, typically arranged as about 12 First, 6 Comfort+, and 162 Main seats, although the operator mix can vary by refit. In service with Delta from its delivery, the airplane is used on short- to medium-haul domestic and transcontinental routes consistent with the 737-900ER mission profile, operating from Delta's Atlanta base among other hubs. Avionics and systems conform to Boeing 737NG standards as configured for mainline Delta operations, and the airframe follows the carrier's scheduled maintenance, cabin refurbishment cycles and in-service upgrades typical for fleet members of this vintage.

The 737-900ER belongs to Boeing's Next Generation 737 family, offering extended range and higher capacity compared with earlier 737-900 variants; with CFM56-7B propulsion and a 3,235 nm range it targets high-density short- to medium-range trunk routes. Competing models in the market niche include stretched variants of the Airbus A320 family and newer re-engined narrowbodies; demand for 737-900ERs is driven mainly by mainline carriers and less often by secondary charter operators. Maintenance and resale considerations for this airframe reflect typical NG-series factors: aging airframe hours/cycles, engine shop visits for CFM56-7B units, and the impact of cabin configuration on residual value.