Robinson R44 Raven II crash near Algés, Portugal

A Helibravo Robinson R44 was returning to Algés Heliport from a sightseeing flight over the Tagus when the clutch warning light illuminated on long final at about 450 ft. The pilot carried out the failure procedure, then lost main rotor energy and entered autorotation with a low rotor RPM warning sounding. Pulling collective to clear the heliport perimeter fence, the tail struck it and damaged the tail rotor, and the helicopter landed hard, deforming the skids. None of the three on board were injured.