Transport Canada issued an emergency Airworthiness Directive (AD) on Feb. 15 mandating the grounding of aircraft equipped with certain Pratt & Whitney Canada (P&WC) PT6 turboprop engines until turbine blade replacements are conducted.
This is a companion discussion topic for the original entry at https://www.avweb.com/aviation-news/emergency-ad-issued-for-pt6-turbine-blade-failures