Beech 1900
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Inflight Shutdown; Flight Crew Returned To Departure Airport; General Flight Cancelled / Delayed; General Maintenance Action
Company Policy; Aircraft; Manuals; Procedure
During take-off roll left engine prop rpm rolled back to from 1700 to 500 RPM torque stayed at 3000 ft-lbs. auto-feather was armed but not activated. Pilot feathered engine and performed a left pattern for ZZZ Runway XX and safely.[Identified the issue] after V1 when yawing moment began. [It was caused by] engine propeller governor failure. [In response the pilot] feathered engine and performed a left traffic pattern and landed Runway XX in ZZZ. [I suggest] maintenance leadership be more attentive to pilot write-ups; having spare airplane so routine/unscheduled maintenance is not rushed to meet unrealistic deadlines.
Pilot reported left engine prop RPM rolled back on takeoff; causing them to feather the left engine and return to the departure airport.