Alcoa will take a large second-quarter writeoff.

Aluminum Co. of America said its results will be lowered by $165.7 million, with most of the writedown coming from further plant closings. The nation’s largest aluminum producer took a $175-million charge in cutting its smelting capacity by nearly one-fourth. The latest production cuts reflect a continuing effort throughout the domestic aluminum industry to eliminate older, less efficient equipment and thereby reduce production costs.