AVHerald reports:
On Apr 21st 2023 the NTSB released their
final report and the
docket concluding the probable cause of the incident was:
The failure of maintenance personnel to close the drain mast heater circuit breakers which resulted in the formation of ice in the forward drain mast, an improper flow of wastewater into the main landing gear wheel well, and the formation of ice on one or more aileron system components.