require(['N/search'], 

function(search){

var filterField_1 = 'internalid', filterField_2 = 'mainline', value = 2656;

var mysearch = search.create({
type: search.Type.TRANSACTION,
filters:[[filterField_1, <http://search.Operator.IS|search.Operator.IS>, value], 'AND', [filterField_2, <http://search.Operator.IS|search.Operator.IS>, true]],
columns: ['trandate']
});

mysearch.run().each(function(result){
log.debug(result.getValue('trandate'));
return true;
});
});