(Reuters) - Boeing Co said on Thursday that Turkish Airlines intends to buy 40 787-9 Dreamliners, indicating demand for long-haul aircraft amid declining orders for many wide-body models. The agreement, valued at $10.8 billion at Boeing list prices, comes at a time when Turkish Airlines is looking to strengthen fleet capacity to meet demand for the wide-body airliners. Earlier this month Boeing said it would raise production of 787 Dreamliner jets to 14 a month in 2019, reviving plans previously on hold due to a wobble in demand for wide-body jets. (Reporting by Rachit Vats in Bengaluru; Editing by Sandra Maler)