PD08WRGBGEA04_Amd_01.doc

Purchase Description PD08WRGBGBEA04 Amendment 01, dated 6 March 2009 PD08WRGBGBEA04, 72 kW/90 kVA GENERATOR SET is hereby amended to include the following corrections/clarifications.

Paragraph 3.2 is hereby changed from 270kW to 72kW as follows:

3.2 General. The GPU shall be a stand alone, trailer mounted, self-contained unit capable of providing aircraft quality external ground power. Specifically, the GPU shall be capable of providing: three phase 115/200 volts alternating current (VAC), reconnectable to 230/400 VAC at 400 Hz rated to continuously provide 72 kW / 90 kVA of electrical power; 28.5 volts direct current (VDC) rated to continuously provide 17 kW of electrical power; 270 VDC rated to continuously provide 72 kW of electrical power. Multiple types of electrical power are not required to be available simultaneously. The GPU shall be constructed of modular and easily replaceable subassemblies and components wherever possible. The GPU enclosure shall be suitable for full time outdoor use and be four wheel trailer mounted. The enclosure shall have doors to provide access for maintenance, repair, and replacement of modular components and subassemblies. Components of the GPU shall be UL recognized or listed whenever possible. Additional features and capabilities shall be permitted unless otherwise prohibited by this document."

Paragraph 3.5.2 is hereby changed from ‘recessed male plugs, (NEMA 5-15R or 5-20R style’ to ‘male inlet plugs, (NEMA 5-15P or 5-20P style’ as follows:

3.5.2 Engine starting. The engine of the GPU shall start at and above 0 degrees Fahrenheit with no external assistance. External starting assistance is allowed from -1 to -25 degrees Fahrenheit. The engine is required to operate, but not start at -26 to -40 degrees Fahrenheit. The engine shall start within 30 (± 10%) seconds for a + 32 degree Fahrenheit ambient condition. In colder ambient operating ranges of the GPU, the engine shall start with a maximum of three attempts, each attempt shall not exceed 30 (± 10%) seconds in duration (to avoid starter overheating and battery drain issues). Internal cyclic starting aids such as air intake heaters, glow plugs, etc. may be utilized at temperatures at or above 0 degrees Fahrenheit, or as required by engine manufacturer. Ether based starting aids shall not be used in any temperature range. A combination of installed and external aids such as heat from a winterization type system may be utilized at temperatures from -1 degrees Fahrenheit down to -25 degrees Fahrenheit. The winterization system may include heaters for engine coolant, engine oil, fuel tank, battery warmers, etc. The winterization system shall be designed to operate from an external single phase 120 VAC 60 Hz power source. Note: the winterization system may be powered via use of one or two 15 or 20 amp three wire, polarized, straight blade, non-twistlock, male inlet plugs, (NEMA 5-15P or 5-20P style, recessed, in accordance with NEMA WD 6) depending upon engine manufacturer and contractors cold start power requirements. Winterization plugs shall be provided in the lower portion of the control panel and be equipped with weather-proof spring-loaded (in the closed position) covers. Operational time of the winterization system is dependent upon engine manufacturer's and contractor's design, but in no instance shall the time required to heat the engine exceed eight continuous hours. Note: Circuit breakers and ground fault protection for the winterization system are not required. The winterization system shall incorporate high-temperature shutoff switches to prevent overheating of any fluid or component.