N604CG

The airframe bearing tail number N604CG is a Canadair-built business jet, a Canadair CL-600-1A11 Challenger 600S completed in 1982 with manufacturer's serial 1048. The airframe is documented as registered in the US and is listed in corporate ownership as COULSON AVIATION (USA) INC, a foreign corporation based in Portland, OR, US. Built by Canadair Ltd, this specific Challenger sits within the early Challenger 600 series production run and retains its original lineage and US registration details. Publicly noted registry and ownership entries identify the unit as corporate-operated from Portland with records reflecting its status under a foreign corporation charter.

The airframe is fitted in a large-cabin, typical executive configuration accommodating 11–13 seats, with cabin dimensions approximately 28 ft 3 in in length, 8 ft 2 in in width and 6 ft 1 in in height, supporting long-range corporate missions and regional executive transport. Avionics in the baseline production Challenger 600 family were original Collins/Sperry analog flight guidance systems from the Pro Line era (SPZ-650); this airframe is noted within the model context as having the original analog Pro Line-era fit, while many sister ships receive later avionics retrofits depending on owner preferences. Typical mission profiles for this configuration emphasize transcontinental and offshore ferry legs within the listed 2,909 nm range at cruise speeds near 425 kts, operating from the operator’s Portland area base for charter, repositioning, or corporate logistics. Maintenance considerations follow Challenger 600 vintage patterns, with focus on older analog avionics serviceability and the twin ALF502L-2 turbine maintenance programs.

The Challenger 600-series occupies a large-cabin, transcontinental business category bridging smaller business jets and long-range airliners, valued for cabin volume and payload-range capability. With twin Avco Lycoming ALF502L-2 engines rated at 7,500 lbf each and a service ceiling of 41,000 ft, the type competes historically with large-cabin types of its era and later light long-range business jets. Demand from buyers and charter operators often centers on cabin comfort and range, while resale and maintenance factors hinge on engine program status, structural fatigue inspections, and whether an airframe has undergone avionics modernization from its original Collins/Sperry analog fit.