455、once designed and approved, the establishment of thorough maintenance procedures is a must.

868、The center of gravity moves in relation to the loads on the wings

867、Structural or equipment modifications can change the basic mass and the center-of-gravity coordinates

866、Speed-attitude Correction system automatically maintains a safe flight attitude by correcting for effects of speed.

865、Solvent that stays on the part can cause corrosion.

864、Solenoid valves shall be shown with a notation indicating whether the valve is spring-loaded to the open or closed position.

863、Rinse the basin with water

862、Remove the sleeve to releasee the sliding tube.

861、Remove the sealant with a blunt scraper.

860、Remove the pin before you turn the pulley.

859、Rectify the defect before you stop the/pump momentarily.