FIELD: aircraft manufacture; fuel filling systems. SUBSTANCE: stringers of upper panel of main tank are provided with holes at top points at level of shear of intake branch pipe of additional vent pipe line connecting the main and auxiliary tanks and shear of outlet branch pipe of overflow pipe line running from auxiliary tank to main tank is located in auxiliary tank at level of shear of intake branch pipe of additional vent pipe line. Besides, pipe lines fitted with filling cocks and connected to filling mech are mounted in fuel tanks. System provides for complete filling of main tank and excludes ejection of fuel from main tank to auxiliary one at changes of aircraft attitudes and at parking. EFFECT: simplification of filling system, reduced mass of system, low cost and ease of servicing. 2 dwg
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