Duncan Aviation’s helicopter component repair services business rose 80% in 2017 and the growth is expected to continue through 2018, the company said. Duncan has not always been widely known in the helicopter market, despite having been in business for more than 40 years. But additional repair capabilities and new customers in recent years have brought about a change, in particular since exhibiting for the first time at Heli-Expo 2016. In 2017, Duncan gained exclusive repair service ...