UK AAIB September 2007
 

HEMS MD900 lands on garage forecourt, metal sign sucked into disc, lands OK. here

Twin Squirrel (F2) practice RTO ends in hard landing.
here
Unexplained power fluctuations in H500 on approach cause very heavy landing and roll-over.
here
RAF2000 gyroplane's rotor stops at 450ft, result inevitable. Four separate possible causes identified.
here
R44 TR strike while landing.
here
RPM droop during recovery from practice auto in Rotorway Exec, rolls over on landing.
here