Simplify the following text for a Grade 6 native English-speaking person.
Original: The Goose was Grummanâ s first monoplane to fly , its first twin-engined aircraft , and its first aircraft to enter commercial airline service .
Simplified: The Goose was Grummanâ s first monoplane to fly . It was also Grumman 's first twin-engined aircraft as well as their first aircraft to provide commercial service .