N371SB

N371SB is a Cessna Golden Eagle 421, a twin-engine piston aircraft operated by N333BC LLC. SkyMeter has tracked 152 flights totalling 329 hours of airtime via ADS-B. The most frequent segment is KCOS to KCOS. Service window in our records spans 325 days. Of those flights, 26 (17.1%) carry at least one detected incident — go-around, unstable approach, stall warning, or runway excursion. The Cessna Golden Eagle 421 has a 44 ft wingspan, a maximum takeoff weight of 7,450 lb.

About the Cessna Golden Eagle 421

The Cessna 421 Golden Eagle represents the pinnacle of Cessna's piston-twin line, introduced in 1967 as the company's first pressurized light twin. With its distinctive geared Continental GTSIO-520 engines and cabin pressurization differential of 5.0 psi, the 421 carved out a unique niche between unpressurized twins and turboprops, offering business travelers and cargo operators the ability to cruise comfortably at altitudes up to 30,000 feet while burning avgas instead of jet fuel. The Golden Eagle became particularly popular for air ambulance work, corporate transport, and specialized missions requiring pressurized cabin comfort without turbine operating costs.

Cessna produced the 421 through three main variants over nearly two decades. The original 421 gave way to the 421B in 1976 with improved systems and aerodynamics, and finally the 421C Golden Eagle III in 1976, which featured a new wet wing eliminating the distinctive wingtip fuel tanks of earlier models. The C model's increased fuel capacity and refined handling made it the most sought-after variant. Maximum cruise speeds reached 240 knots true airspeed at altitude, with typical missions flown in the 200-220 knot range. The aircraft's 1,200-nautical-mile range with reserves made it a capable cross-country machine, though the geared engines required careful management and regular maintenance to avoid costly overhauls.

Today the 421 remains active in diverse roles from cargo feeders to survey platforms, valued for its spacious cabin, pressurization, and known-quantity piston reliability despite maintenance demands. The type's pressurized comfort and relatively modest operating costs compared to turboprops keep it economically viable for operators who can manage the engine maintenance schedule. SkyMeter has tracked flights across airframes and operators, with the largest observed operator.