"full-fledged member" is a valid phrase in English and can be used in written English.
For example, "After weeks of training, Tom was proud to be a full-fledged member of the firefighting team."
She also became a full-fledged member of Solidarity Alliance.
One of them, Spartak Hoxha, went to become a full-fledged member of City Ballet.
But Mirabel, his little sister, is a full-fledged member of the pouch generation.
He was barely fourteen when the Party accepted him as a full-fledged member.
Thus, Canada finally became a full-fledged member of the community of nations.
The spokesman did not know if Mr. Welding had become a full-fledged member yet.
Ms. Morgan was selected as a full-fledged member of the astronaut corps in 1998.
I remain a full-fledged member in the community of the agog.
At the time, Saa testified, Dominguez was not a full-fledged member of the gang.
From that point on, Kuzmin was a full-fledged member of Russia's cultural elite.
"Make the quant a full-fledged member of your team," Davenport says.
