What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Post extensive maintenance, aircraft had been equiped with micro-vibe equip for main rotor track & balance, and was equipped with a hanging bambi bucket during the maintenance flight.
During the maintenance flight at an apx 20' hover, the pilot felt a 'flutter' & 'vibration', then heard a 'pop', and the aircraft began an uncommended nose right yaw. The pilot accomplished the mfg recommended ep's. the a/c landed hard in a shallow pond.
A/c was destroyed.
As the FAA filed it
POST EXTENSIVE MAINTENANCE, AIRCRAFT HAD BEEN EQUIPED WITH MICRO-VIBE EQUIP FOR MAIN ROTOR TRACK & BALANCE, AND WAS EQUIPPED WITH A HANGING BAMBI BUCKET DURING THE MAINTENANCE FLIGHT.
DURING THE MAINTENANCE FLIGHT AT AN APX 20' HOVER, THE PILOT FELT A 'FLUTTER' & 'VIBRATION', THEN HEARD A 'POP', AND THE AIRCRAFT BEGAN AN UNCOMMENDED NOSE RIGHT YAW. THE PILOT ACCOMPLISHED THE MFG RECOMMENDED EP'S. THE A/C LANDED HARD IN A SHALLOW POND.
A/C WAS DESTROYED.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.