ABC board members have criticised sacked managing director Michelle Guthrie's demand to return to the role in her lawsuit filed against the broadcaster.

Ms Guthrie's push to be reinstated has been described by multiple board members as "legal tactics" and "completely unworkable", according to the Sydney Morning Herald.

The ex-managing director, who was fired in September halfway through her five-year-term, has launched legal action against the ABC in the Federal Court, also naming former chairman Justin Milne and three current board directors as defendants.

In her application on December 20, Ms Guthrie claimed she was unfairly dismissed, and her firing was "invalid".

But the ABC will defend itself as the termination was lawful, according to a spokeswoman for the broadcaster.

"Ms Guthrie was dismissed because the board had lost confidence in her. She was not dismissed because of any complaints she'd made," the spokeswoman said in a statement.

Ms Guthrie alleged she was fired because of complaints against ex-chairman Mr Milne, who resigned two days after her firing amid allegations he had asked her to sack two journalists because the federal government didn't like their reporting.

Mr Milne has also been accused of touching Ms Guthrie inappropriately at a board meeting last year, but he has previously denied all allegations against him.

As part of the lawsuit, Ms Guthrie has sought 14 orders from the Federal Court, including declarations that board members Donny Walford, Joseph Gersh and Vanessa Guthrie had been involved in the ABC's contravention of the Fair Work Act.

The former News Corp executive has also sought the payment of damages, compensation and penalties, along with her reinstatement as managing director and an order requiring the ABC take "all steps to ensure that the applicant be able to fulfil the roles and duties of her appointment ... for the remainder of the term".

The matter is set to be heard in court on February 5.

The September sacking followed ongoing internal tensions, which quickly became a public stoush in the following months as employees voiced their concerns over management.

A Senate inquiry into allegations of political interference was also launched, and is set to report its findings by March 29.

Communications minister Senator Mitch Fifield has declined to comment on the lawsuit.