Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor
Flight Crew Last 90 Days 35; Flight Crew Total 3500; Flight Crew Type 300
Situational Awareness
Aircraft Equipment Problem Critical; Ground Event / Encounter Loss Of Aircraft Control; Ground Event / Encounter Object; Ground Event / Encounter Person / Animal / Bird
Aircraft Aircraft Damaged; Flight Crew Regained Aircraft Control; General Maintenance Action; General Physical Injury / Incapacitation
Aircraft
Both engines of aircraft were started and a medical staff member disconnected GPU. Co-pilot engaged generators. I (PIC) began to roll up the throttles to 100 percent when aircraft began to spin counter-clockwise. I added right pedal and made sure collective was full down. [I] continued to add pedal until at full stops and spin continued. [I] rolled off the throttles. Medic was knocked to the ground by aircraft; no injuries other than scraped knee. Aircraft came to rest after spinning 270 degrees. Aircraft was 0.8 hours out of major maintenance. Aircraft struck a plastic pillar on side of pad with tail boom and co-pilot's chin bubble; minimal damage. Aircraft was trucked to a maintenance facility for further inspection. Both co-pilot and PIC were in agreement that no left pedal was in due to prestart check and that the collective was full down. Aircraft left deep scars in the concrete through whole spin.
Bell 412; recently out of maintenance; started counterclockwise spin on startup as soon as pilot rolled RPM up toward 100%. Full right pedal; full down collective; and RPM roll back stopped spin at 270 degrees. Minor injury to ground assistant and minor damage to aircraft.