N515MD

N515MD is a Mitsubishi Heavy Industries MU-2, a twin-engine turboprop operated by DOBLE MARK D. SkyMeter has tracked 144 flights totalling 83 hours of airtime via ADS-B across 2 callsigns. The most frequent segment is KDED to KDED. Service window in our records spans 296 days. Of those flights, 4 (2.8%) carry at least one detected incident — go-around, unstable approach, stall warning, or runway excursion. The Mitsubishi Heavy Industries MU-2 has a maximum takeoff weight of 11,575 lb, light wake category.

About the Mitsubishi Heavy Industries MU-2

The Mitsubishi MU-2 is a high-performance twin-turboprop business aircraft that earned a reputation as one of the fastest and most efficient light twins ever built, cruising at speeds approaching 300 knots—faster than many early jets. Manufactured by Mitsubishi Heavy Industries from 1963 through 1986, the MU-2 was designed with an unusual configuration for its era: full-span flaps, no ailerons (spoilers for roll control), and counter-rotating propellers that eliminated critical-engine concerns. Over 700 were produced across dozens of variants, serving corporate operators, air ambulance services, and military forces worldwide. The type's straight wing and powerful Garrett TPE331 engines delivered exceptional short-field performance and climb rates, making it popular for operations into challenging airports, though its unique handling characteristics and high wing loading demanded rigorous pilot training—a factor that led to an FAA-mandated Special Federal Aviation Regulation (SFAR 108) requiring type-specific training for all MU-2 pilots.

The MU-2's speed came at a cost: its approach speeds were notably higher than conventional twins, and its spoiler-only roll control required pilots to unlearn aileron habits. Early accident rates prompted extensive safety reviews, ultimately resulting in one of the most comprehensive type-specific training programs in general aviation. Despite the learning curve, operators who mastered the aircraft praised its reliability, cabin comfort, and operating economics. The MU-2 could haul six to nine passengers at jet-like speeds while burning turboprop fuel, and its pressurized cabin reached altitudes above 25,000 feet. Many examples remain in active service today, particularly in cargo, air ambulance, and owner-flown corporate roles, testament to the airframe's robust construction and enduring performance advantages.

SkyMeter has tracked flights across airframes and operators, with the largest observed operator.