Grumman G-73 Mallard

Twin Piston

The Grumman G-73 Mallard is a twin-engine amphibious aircraft that epitomizes the golden age of luxury flying boats. First flown in 1946, the Mallard was designed as a high-end commercial amphibian for short-haul routes and wealthy private owners who wanted the freedom to land on water or pavement. Grumman built just 59 examples between 1946 and 1951, making it one of the rarer postwar amphibians still flying today. Powered by two Pratt & Whitney R-1340 radial engines producing 600 horsepower each, the Mallard could carry 10-12 passengers in a pressurized cabin—a genuine luxury for an amphibian of its era. Its robust construction and versatile landing gear made it a favorite for island-hopping operations in the Caribbean, Alaska, and the Pacific Northwest. The type saw service with small airlines, charter operators, and private owners who valued its ability to access remote waterfront destinations unreachable by conventional aircraft. Though most Mallards have been retired or lost to accidents over the decades, a dedicated community of owners and restorers keeps a handful airworthy, often with modern turboprop conversions that dramatically improve performance and reliability. The Mallard's distinctive boat hull, high wing, and radial-engine rumble make it instantly recognizable at seaplane bases and airshows. SkyMeter has tracked flights across airframes and operators, with the largest observed operator.