The first addition to the Boeing 787 family made its maiden test flight. The 787-9 is 20 feet longer and seats 40 more passengers than the 787-8, which carries 210 to 250 passengers. The new version of the fuel-efficient, long-haul wide-body known as the Dreamliner also can carry more cargo and fly farther. The 787-9 has 388 firm orders, Boeing said. The original 787-8 was delivered in September 2011, nearly three years late because of production problems.