On January 28, 1995, about 1730 eastern standard time, N5008N, a Bell 206-B3 helicopter experienced an engine failure in Miami, Florida, while on a 14 CFR Part 135, on-demand, passenger local flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The helicopter was substantially damaged and the pilot and two passengers were not injured. The flight originated from North Perry Airport, Hollywood, Florida, about 30 minutes earlier. The pilot stated that while in cruise flight about 800 feet above the ground over a football stadium the engine failed. He initiated an autorotation and applied collective pitch early to avoid wires. The helicopter then landed hard damaging the belly and the transmission mounts. Examination of the engine revealed the compressor discarge pressure line [PC] was loose at the fuel control.