CAMERON, SC, USA
N4029R
HILLER UH-12E
THE PLT STATED THAT HE WAS ON A TRIMMING/SWATH RUN AT ABOUT 15 FT AGL & 15 MPH WHEN HE HEARD A STRANGE NOISE WHICH WAS FOLLOWED BY A 180 DEG YAW. SUBSEQUENTLY, THE HELICOPTER CRASH LANDED, DAMAGING THE TAIL BOOM & TAIL ROTOR BLADES AND SPREADING THE LANDING GEAR. AN EXAM REVEALED THAT THE ENG DRIVE TORSION COUPLING, PN 21046-5, HAD FAILED AT THE INTERLOCKING STEEL & RUBBER ASSEMBLY.
Source: NTSB Aviation Accident Database
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