Sunwest Bank in Tustin posted net income of $367,000 in the third quarter, more than double the $140,000 earned last year. For the first nine months, the bank's net income was $736,000, more than triple the $209,000 earned a year earlier. The bank's assets were $172.5 million at the end of September, a 19.8% increase from $144 million a year earlier. Its total deposits rose 15% to $153 million at the end of September from $133 million last year, while Sunwest's loan portfolio grew 28.3% to $136 million from $106 million. Sunwest is a subsidiary of Centennial Beneficial Corp., a multibank holding company based in Orange.