US aircraft manufacturer Boeing on Monday told employees it is currently unable to expand production of its long-haul 787 Dreamliner model as quickly as planned due to supply bottlenecks, broadcaster CNBC reported. The company told employees at its 787 plant in the US state of South Carolina that the delays were due to supplier shortages of “a few key parts,” according to a memo cited by the broadcaster. Boeing confirmed on enquiry that the report was correct. There were no details as to which components were missing. According to the latest information, Boeing was building around five Dreamli…