What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On August 12th, 2025, the airman was conducting a maintenance ground run in helicopter privacy data omitted at the Gettysburg Airport. The purpose of the run-up was to perform a magneto check and to confirm which of two hobbs meters were working correctly, no flight was planned. Using the manufactures check list the airman started to work through the steps referenced in the check list which brought him too the point where he started the engine. Once the engine temperatures were within required parameters, he began to increase the throttle to perform an engine mag check. At approximately 2100-2200 RPM, the aircraft experienced one light shake/hop the airman immediately rolled the throttle to idle and ensured that the collective was in the full down position. Within 5-8 seconds from first indication that there was an issue everything came to a complete stop.
There were no abnormal noises, vibrations, or unusual anomalies detected during the run-up. The helicopter went into ground resonance and self destructed.
As the FAA filed it
ON AUGUST 12TH, 2025, THE AIRMAN WAS CONDUCTING A MAINTENANCE GROUND RUN IN HELICOPTER ^PRIVACY DATA OMITTED^ AT THE GETTYSBURG AIRPORT. THE PURPOSE OF THE RUN-UP WAS TO PERFORM A MAGNETO CHECK AND TO CONFIRM WHICH OF TWO HOBBS METERS WERE WORKING CORRECTLY, NO FLIGHT WAS PLANNED. USING THE MANUFACTURES CHECK LIST THE AIRMAN STARTED TO WORK THROUGH THE STEPS REFERENCED IN THE CHECK LIST WHICH BROUGHT HIM TOO THE POINT WHERE HE STARTED THE ENGINE. ONCE THE ENGINE TEMPERATURES WERE WITHIN REQUIRED PARAMETERS, HE BEGAN TO INCREASE THE THROTTLE TO PERFORM AN ENGINE MAG CHECK. AT APPROXIMATELY 2100-2200 RPM, THE AIRCRAFT EXPERIENCED ONE LIGHT SHAKE/HOP THE AIRMAN IMMEDIATELY ROLLED THE THROTTLE TO IDLE AND ENSURED THAT THE COLLECTIVE WAS IN THE FULL DOWN POSITION. WITHIN 5-8 SECONDS FROM FIRST INDICATION THAT THERE WAS AN ISSUE EVERYTHING CAME TO A COMPLETE STOP.
THERE WERE NO ABNORMAL NOISES, VIBRATIONS, OR UNUSUAL ANOMALIES DETECTED DURING THE RUN-UP. THE HELICOPTER WENT INTO GROUND RESONANCE AND SELF DESTRUCTED.