At approximately 14:45 mountain time, an Agusta A119 helicopter crashed during landing at the Mackay-Dee Hospital helipad. All three occupants were slightly injured. The pilot said the approach was a little high and he lowered collective control. Rotor rpm and N2 decayed to 96%, then dropped to 80% and did not recover. A hard landing ensued and the helicopter rolled over on its left side. The helicopter, one of three in operation, had approximately 39 hours time-in-service. Previous maintenance discrepancies included several reports of rotor rpm and N2 decay of approximately 4% whenever collective was lowered, but all of these discrepancies occurred during ground tests.