N401YK

The airframe bearing tail number N401YK is a converted freighter of type Boeing 737-436(SF), built in 1993 with manufacturer serial number 25860. The aircraft is registered in the US and is owned by NAS AIRCRAFT LEASING COMPANY LLC, a corporation based in Anchorage, AK, US, which serves as its current registered owner and nominal home base. Notable registry information includes its US registration and documented freighter conversion status; valuation and detailed condition reports are Not published. The airframe’s configuration and ownership position it primarily as a leased freighter asset within regional cargo operations.

The airframe carries a freighter conversion designation (SF), indicating a main-deck cargo layout with a minimal or removed passenger cabin; its cabin is therefore configured chiefly for cargo pallets or containers rather than passenger accommodation. Typical mission profiles for this specific aircraft center on short- to medium-range cargo sectors within its 2,060 nm range and regional feeder routes operating from its Anchorage registration base. Avionics fitment and specific operational equipment are not published in the provided data; maintenance considerations for this airframe follow standard 737-400 series freighter practices, including attention to freighter conversion structural modifications and main-deck cargo handling systems. Operator-level unique amenities are not applicable due to the freighter configuration.

The Boeing 737-436(SF) is a member of the 737 Classic family adapted for main-deck freight, offering a blend of runway performance and regional payload capability that fits short- to medium-haul cargo markets. Competing models in this niche include other 737 Classic freighters and smaller narrowbodies converted to freighter standard; demand is driven by regional logistics requirements and leasing availability. Maintenance and resale considerations for this specific airframe reflect its 1993 build year and freighter conversion status, with prospective operators focusing on remaining structural fatigue life, engine shop visit cycles for the CFM56-3C1 units, and conversion-specific component histories.