The Fairfax County School Board has adopted an affirmative action hiring plan to nearly double the percentage of teachers who are members of racial minorities over the next five years.

The plan, which creates the position of equal opportunity coordinator, calls for increasing the proportion of minorities among the county's 6,388 teachers from the current 6.2 per cent to 11 per cent by 1983.

The hiring plan was agreed to unanimously at a board meeting Thursday night.

At the same meeting the board released a copy of a brief letter from board member John J. Caussin to County Supervisor Marie B. Travesky (R-Springfield) saying he doesn't intend to seek reappointment to another term in July. Caussin cited "continued disagreements" with Travesky as his reason.

The school boards adoption of an affirmative action plan comes eight months after the county government approved a plan requiring that minorities make up 40 per cent of those hired this year to fill 325 county jobs.

The school board's plan also specifies women should make up 45 percent of the total number of school administrators by 1983, compared to the present 34 percent. In addition, 12 percent of elementary school teachers would be men, compared to the current 8.6 percent.

Minorities mostly blacks, make up about 11 percent of all Fairfax County school employees, but most hold non-instructional jobs as custodial posts.

Caussin said his letter to Travesky resulted from what he called the supervisor's displeasure over some of his stands on the school board, such as his support for a 6 percent pair increase for teachers.

In addition, he claimed it was difficult to meet with Travesky, who appointed him to the board 2 1/2 years ago.

"There just wasn't any mutual respect or communition left," Caussin said.

Travesky called Caussin's decision an "overreaction" to her informing him she would open the subject of his reappointment to public hearing "to give the public some input." She denied she displeased with Caussin's performance on the board.

She called Caussin's charge that she had been inaccessible " ridiculous.