N7991U

N7991U is a Cessna 150, a single-engine piston aircraft operated by ALTERNATE AIR INC. SkyMeter has tracked 304 flights totalling 228 hours of airtime via ADS-B. The most frequent segment is KBFI to KBFI. Service window in our records spans 398 days. Of those flights, 56 (18.4%) carry at least one detected incident — go-around, unstable approach, stall warning, or runway excursion. The Cessna 150 has a 33 ft wingspan, a maximum takeoff weight of 1,600 lb.

About the Cessna 150

The Cessna 150 is the most successful two-seat trainer in aviation history, with over 23,000 built between 1958 and 1977. Designed as an affordable entry point into flying, it became the backbone of flight schools across North America and remains so today, nearly half a century after production ended. Its simple all-metal construction, forgiving handling, and rugged Continental O-200 engine made it ideal for student pilots learning the basics of stick-and-rudder flying.

The 150 introduced a generation of aviators to the sky, and its ubiquity in the training fleet means that countless pilots earned their private certificates behind its yoke. The type evolved through numerous variants, with later models adding features like the swept tail, Omni-Vision rear window, and improved flap systems, but the core design remained unchanged: a high-wing, tricycle-gear trainer optimized for economy and durability. With a cruise speed around 90 knots, a service ceiling near 14,000 feet, and endurance of roughly four hours, the 150 was never fast or glamorous, but it excelled at its mission.

Its low operating costs and simple maintenance kept it in service long after newer designs appeared, and today it remains a favorite among flying clubs, independent instructors, and budget-conscious private owners. SkyMeter has tracked flights across airframes and operators, with the largest observed operator.