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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.
| Attributes | |
| ACN | 1002689 |
| Time | |
| Date | 201204 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Bell Helicopter 412 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Parked |
| Route In Use | None |
| Flight Plan | None |
| Component | |
| Aircraft Component | Tail Rotor |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor |
| Experience | Flight Crew Last 90 Days 35 Flight Crew Total 3500 Flight Crew Type 300 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Ground Event / Encounter Loss Of Aircraft Control Ground Event / Encounter Object Ground Event / Encounter Person / Animal / Bird |
Narrative:
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.
Original NASA ASRS Text
Title: 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.
Narrative: 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.
Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.