For Friday, April 24 we outline the key earnings reports and economic data to keep an eye on. On the earnings front, we watch for quarterly financial results from drug maker Biogen Inc (BIIB), copy machine company Xerox Corp (XRX), and American Airlines Group Inc (AAL). All three companies are scheduled to report before the market opens. American Airlines is expected to earn $1.2 billion for the first quarter, which would set a new company record. Still, the carrier said it expects a decline in passenger-revenue-per-available-seat-mile for the period. On the economic calendar, we look to the Commerce Department for durable goods orders. TheStreet's Kurumi Fukushima reports in New York.