ANA may have to scrap more than 300 Dreamliner flights through the end of September as it moves to replace parts inside the engines on a portion of its 787 fleet, Takeo Kikuchi, a deputy senior vice president of engineering and maintenance at ANA, told reporters in Tokyo.

ANA said that under certain flying conditions the compressor blades in the engine’s interior showed corrosion. It said it will cancel nine domestic 787 flights on Friday, with other cancellations likely in the coming weeks.

ANA’s Dreamliners are powered by Rolls-Royce Trent 1000 engines.

Press release ANA

Picture Rob Vogelaar