MIL-STD-1518E
d. Funnels, spouts and other such devices used to service aircraft engine oil and hydraulic fluid shall be kept clean and free of contaminants.
e. Unused portions of 1-quart or 1-gallon containers of aircraft oils and hydraulic fluid shall be discarded or transferred to servicing equipment.
5.2.9.2 Aircraft (turbine and reciprocating) engine lubricating oil.
a. Aircraft engine oil furnished in 1-quart or smaller, sealed containers may be serviced to aircraft without further filtration.
b. Aircraft engine oil furnished in 55-gallon drums may be serviced directly to engines through a mesh screen (100 mesh for turbine engines and nominal 60 mesh for reciprocating engines).
c. For engine oil servicing equipment other than cans or drums, the requirements of individual aircraft technical orders will apply for the specific servicing equipment.
5.2.9.3 Aircraft hydraulic fluid.
a. Servicing hydraulic fluid to aircraft may be direct from the 1-quart or 1-gallon cans.
b. Hydraulic fluid furnished in 10-or 55-gallon drums will not be serviced to aircraft except through specialized servicing equipment. Such equipment will contain a nominal 5-micron filter in the servicing system. Servicing connections will be protected from external contamination by covering hose ends with plugs or caps and placing connection in plastic bags.
5.3 Safety requirements. The safety requirements specified in NFPA 407 or the equivalent national document shall apply. Local fire and accident prevention regulations and requirements including the following shall be complied with:
a. Smoking and/or open flames or sources of ignition shall be prohibited within 15 meters (50 feet) of fuel operations.
b. Areas where aircraft are serviced shall be kept free of combustible materials. Refueling equipment compartments and surfaces shall be kept free of debris, accumulated oil, grease, and fuel. These areas shall be kept clear of objects that can be ingested by engines.
c. Servicing personnel shall be trained how to use fire extinguishers and in the procedures to follow in the event of fire.
d. At a minimum, the following fire extinguisher requirements shall be met during fueling operations:
(1) At least two serviceable, charged fire extinguishers shall be available in the immediate vicinity of each servicing operation. Access to the fire extinguisher shall be unobstructed. Each fire extinguisher shall have a minimum discharge time of not less than 25 seconds.
(2) Extinguishers shall be kept clear of elements such as ice and snow. Extinguishers located in enclosed compartments shall be readily accessible, and their location shall be marked clearly in letters at least 50 mm (2 in.) high.
(3) Where the open hose discharge capacity of the aircraft fueling system or equipment is more than 750 L/min (200 gpm), at least one listed wheeled extinguisher having a rating of not less than 80-B:C and a minimum capacity of 55 kg (125 lbs.) of agent shall be provided.
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