2-74 Change 4
Section XV SERVICING, PARKING, AND MOORING
2.76 SERVICING.
Servicing information is given by systems or compo-nents. Points used in frequent servicing and replenishment of fuel, oil and hydraulic .uid are shown in Figure 2-24. Fuel and lubricant speci.cations and capacities are in Table 2-4. Table 2-5 contains a listing of acceptable commercial fuel.
2.77 SERVICE PLATFORMS AND FAIRINGS.
Service platforms are a part of the engine cowlings, pro-viding access to the engines. Each service platform is about 46 inches long and 18 inches wide. It is capable of support-ing a static weight of 400 pounds on any area without yielding. The platform is made of composite metal and .-berglass with a honeycomb core. The engine cowling is opened by releasing a latch on the side and pulling outward on a locking handle. The cowling is opened outward and down, providing a standing area at the lower section. When closed, the cowling lock prevents opening in .ight.
2.78 FUEL SYSTEM SERVICING.
a.
Both tanks (Figure 2-24) may be serviced simulta-
neously through pressure refueling or closed circuit refuel-ing. They may be serviced individually by gravity refueling through refueling ports on the left and right sides of the helicopter.
b.
The external extended range tanks can only be serviced by gravity refueling through refueling ports on the forward top of each tank.
2.78.1 Fuel Types. Fuels are classi.ed in Table 2-5.
2.78.2 Use of Fuels. Mixing of fuels in fuel tanks. When changing from one type of authorized fuel to an-other, for example JP-4 to JP-5, it is not necessary to drain the helicopter fuel system before adding the new fuel. Fuels having the same NATO code number are interchangeable. Jet fuels conforming to ASTM D-1655 speci.cation may be used when MIL-T-5624 fuels are not available. This usually occurs during cross-country .ights where helicop-ters using NATO F-44 (JP-5) are refueled with NATO F-40 (JP-4) or Commercial ASTM Type B fuels. Whenever this condition occurs, the operating characteristics may change in that lower operating temperature: slower acceleration, easier starting, and shorter range may be experienced. The reverse is true when changing from F-40 (JP-4) fuel to F-44 (JP-5) or Commercial ASTM Type A-1 fuels.
2.78.3 Gravity Refueling.
1.
Ground helicopter to fuel truck or other suitable ground.
2.
Plug hose nozzle ground into the helicopter grounding jack, marked GROUND HERE, above refueling ports.
3.
Remove fuel .ller caps and refuel. Refer to Table 2-4 for fuel quantities.
2.78.4 Pressure Refueling.
1.
Ground helicopter to fuel truck or other suitable ground.
2.
Ground fuel dispenser nozzle to the helicopter grounding point marked GROUND HERE, above refueling ports.
Damage to the fuel system could result if refueling hose pressure exceeds 55 psi during pressure refueling or 15 psi during closed circuit refueling.
3. Connect fuel dispenser nozzle to pressure refu-eling adapter.
NOTE
The system is designed to restrict fuel .ow to 300 gpm during pressure refueling at a nozzle pressure of 55 psi and 110 gpm at a nozzle pressure of 15 psi during closed cir-cuit refueling.
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