The airline transport certificated pilot, with four passengers, departed on a Title 14, CFR Part 91, local area revenue sightseeing flight in a skid-equipped helicopter. According to the operator's chief pilot, the accident pilot reported that while in cruise flight, the fuel pump warning light illuminated, and he began a precautionary landing approach to a vacant parking lot. While on final approach to the parking lot, the pilot said the "engine flamed out." The pilot initiated an autorotation, but the helicopter landed hard. The helicopter's landing gear cross-tubes were deformed, the pilot's windscreen was broken, and the fuselage received structural damage. An FAA inspector reported that an examination of the helicopter revealed that it had flown 1.5 hours before the accident. The helicopter's fuel gauge, annunciator system, fuel pump, and fuel system, functioned normally. A pressure check of the fuel lines revealed no leakage. The inspector indicated that the fuel tank contained about 40 ounces of fuel. The inspector reported that during his examination of the helicopter, no mechanical malfunction was found.