通气油箱排放单向活门是在1号和2号主油箱外侧油箱端部肋上。
A A surge tank drain single valve is on the outside fuel tank end rib in main tank 1 and main tank 2.
B A surge tank drain one way value is on the inboard fuel tank end rib in main tank 1and main tank 2.
C A surge tank drain check valve is on the outboard fuel tank end rib in main tank 1and main tank 2.