The Grumman G-73 Mallard is a medium, twin-engined amphibious aircraft.We have issued over 50 Engineering Orders for the Grumman Mallard Seaplane as part of ongoing upgrades and fleet modernisation spanning several years until today. Upgrades include control surface modifications, avionics upgrades and numerous other improvements. Wally Thomson, the Founder of Thomson Design was himself the lead engineer at Aerospace Engineers Australia(AEA) involved in the Pratt & Whitney PT6 turbine engine upgrades/flight test program of the G-73 Mallard for Paspaley Pearling.