N403YK

The airframe bearing tail number N403YK is a Boeing-built freighter delivered from the 1992 production run, serial number 25842. It is registered in the US and is owned and operated by NORTHERN AIR CARGO LLC, a corporation based in Anchorage, AK, US. This airframe has been modified from its original passenger configuration to a main-deck freighter; the conversion is a notable registry and configuration change documented for this specific shipset. Valuation and condition summaries for this individual airframe are not published publicly.

This Boeing 737-436 (SF) is configured as a main-deck freighter with no passenger seating, reflecting its conversion to cargo service and the absence of a traditional passenger cabin. Avionics fit and detailed equipment lists for this specific airframe are not published in the provided data; typical 737-400SF conversions concentrate on strengthened main-deck flooring, large cargo door installations, and associated environmental control modifications for freight operations. Operated from the owner’s Anchorage base, missions for this airframe are consistent with short- to medium-range freight duties across regional and domestic routes within the aircraft’s certified range and ceiling. Maintenance considerations specific to this aircraft would focus on the freighter conversion elements and the service life of its CFM56-3C-1 engines, though explicit maintenance status is not provided.

The Boeing 737-436 (SF) occupies a performance niche as a converted narrow-body main-deck freighter capable of short-to-medium range cargo missions, leveraging two CFM56-3C-1 turbofans for reliable thrust and supportability. Competing models in the same role include other 737-300/400 converted freighters and some regional cargo derivatives; buyer demand typically favors proven airframes with conversion records and accessible engine support. Resale and maintenance considerations for this airframe hinge on its conversion pedigree, engine model lifecycle, and the regulatory status of its US registration.