Any Unknown or Unlisted Aircraft Manufacturer
Flight Crew Air Transport Pilot (ATP); Flight Crew Commercial; Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor
Human-Machine Interface
Ground Event / Encounter Ground Strike - Aircraft; Ground Event / Encounter Loss Of Aircraft Control
Aircraft Aircraft Damaged; General Maintenance Action
Aircraft
Engine warm up on the ground to change oil. No intention of flight and helicopter never became airborne. During engine warmup; helicopter rolled to the left; and blades contacted the ground. One occupant; no injuries.
Pilot/Mechanic reported a ground strike of helicopter blade during engine warmup.