[Ref 26 February-4 March 2019 | Flight International | 15]

• CRJ200 suffered a sudden wing drop, just as the aircraft flared for landing
• It descended through an area of cloud during the approach, travelling at 230kt (426km/h)

Interestingly, crew does not need to engage wing anti-ice systems above 230kt, according to the CRJ200 aircraft flight manual

• on-board systems did not indicate the presence of ice
• Post-flight inspection revealed ice-detection system was functioning normally, but “an accumulation of ice” on the leading edge of both wings