By City AM reporter Boeing plans to lay off about 10 per cent of its workers in the coming months as it continues to lose money and tries to deal with a strike that is crippling production of the company’s best-selling airline planes. New chief executive Kelly Ortberg told staff in a memo on Friday that the job cuts will include executives, managers and employees. The company has about 170,000 employees worldwide, many of them working in manufacturing facilities in the states of Washington and South Carolina. Boeing had already imposed rolling temporary furloughs, but Ortberg said those will b…