Отключить поиск по описаниям товаров в Битрикс

<?
AddEventHandler("search", "BeforeIndex", "BeforeIndexHandler");
function BeforeIndexHandler($arFields)
{
    $arrIblock = array(49);
    $arDelFields = array(
        "DETAIL_TEXT",
        "PREVIEW_TEXT"
    );
    if (
        CModule::IncludeModule('iblock')
        && $arFields["MODULE_ID"] == 'iblock'
        && in_array($arFields["PARAM2"], $arrIblock)
        && intval($arFields["ITEM_ID"]) > 0
    ) {
        $dbElement = CIblockElement::GetByID($arFields["ITEM_ID"]);
        if ($arElement = $dbElement->Fetch()) {
            foreach ($arDelFields as $value) {
                if (isset ($arElement[$value]) && strlen($arElement[$value]) > 0) {
                    $arFields["BODY"] = str_replace(CSearch::KillTags($arElement[$value]), "", CSearch::KillTags($arFields["BODY"]));
                }
            }
        }
        return $arFields;
    }
}

?>