1751. Make sure that the tubes have no deformation

1612. The isolation valves are identical and interchangeable with each other and with the APU shutoff valve

1611. 选择要增压的液压系统。

1610. 下次检查时更换组件。

1609. Monitor the indications during the retraction test

1608. When you fill oxygen cylinder, you must mandatorily obey the replenishment procedure for oxygen cylinder

1607. Polish the surface until it is very shiny

1606. Replace the insulation blankets that show chafing

1605. Align the drill until it is perpendicular to the surface

1604. Safety the clamp block across control lever forks with safety wires

1603. Make sure that the hydraulic fluid is clean