Swiss has taken the drastic decision of grounding its entire Airbus A220-100 fleet amid ongoing engine issues with Pratt & Whitney Geared Turbofans. The carrier has operated the A220 the longest as it was the launch customer for the type back in 2016, when it was still known as the Bombardier CS100. And while this segment of the fleet consists of “only” 9 aircraft, it’s more negative news for the troubled engine.