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Reporter left helicopter parked with engine idling. Rotor engaged and unmanned helicopter meandered around striking objects before tipping over.
| Attributes | |
| ACN | 287326 |
| Time | |
| Date | 199411 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : gck |
| State Reference | KS |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : corporate |
| Make Model Name | Helicopter |
| Operating Under FAR Part | Part 91 |
| Flight Phase | ground : parked |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : atp pilot : instrument |
| ASRS Report | 287326 |
| Events | |
| Anomaly | other anomaly other anomaly other |
| Independent Detector | other other : unspecified cockpit |
| Resolutory Action | aircraft : equipment problem dissipated |
| Consequence | other Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft had landed and the rotor system was disengaged as the rotor system was spinning down the pilot (which was the only one on board) exited the aircraft. The pilot went in the building when apparently the friction lock on the collective failed to hold, and the collective popped up and the aircraft got light on the skids. The aircraft never went airborne but startied turning in circles. It made a couple turns and struck the tail boom on a pole then the aircraft made a few more turns hit the building and fell over. No one was injured and damage to property other than the aircraft was approximately $500. After talking to a schwitzer service center I determined that this had happened before due to aircraft vibration and wind and besides disengaging the rotor system I should also shut down the engine.
Original NASA ASRS Text
Title: RPTR LEFT HELI PARKED WITH ENG IDLING. ROTOR ENGAGED AND UNMANNED HELI MEANDERED AROUND STRIKING OBJECTS BEFORE TIPPING OVER.
Narrative: ACFT HAD LANDED AND THE ROTOR SYS WAS DISENGAGED AS THE ROTOR SYS WAS SPINNING DOWN THE PLT (WHICH WAS THE ONLY ONE ON BOARD) EXITED THE ACFT. THE PLT WENT IN THE BUILDING WHEN APPARENTLY THE FRICTION LOCK ON THE COLLECTIVE FAILED TO HOLD, AND THE COLLECTIVE POPPED UP AND THE ACFT GOT LIGHT ON THE SKIDS. THE ACFT NEVER WENT AIRBORNE BUT STARTIED TURNING IN CIRCLES. IT MADE A COUPLE TURNS AND STRUCK THE TAIL BOOM ON A POLE THEN THE ACFT MADE A FEW MORE TURNS HIT THE BUILDING AND FELL OVER. NO ONE WAS INJURED AND DAMAGE TO PROPERTY OTHER THAN THE ACFT WAS APPROX $500. AFTER TALKING TO A SCHWITZER SVC CTR I DETERMINED THAT THIS HAD HAPPENED BEFORE DUE TO ACFT VIBRATION AND WIND AND BESIDES DISENGAGING THE ROTOR SYS I SHOULD ALSO SHUT DOWN THE ENG.
Data retrieved from NASA's ASRS site as of July 2007 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.