515.Make sure that equipment in the area is cleared ( )

422.Increase the pressure slowly [not more than one tum each minute]( )

421.The difference between the two dimensions must not be more than 010 mm ( )

420.The additional information may be imparted to existing employees through the recurrent training requirements ( )

419.Those instructions necessary to park or store the aircraft in normal or abnormal conditions such as with engines removed aircraft damaged, etc for short or long terms in extremes of weather conditions( )

418.When the engine RPM decreases to 500, stop the engine( )

417.在烤箱里烘干油滤。 ( )

416.Basically, it is a guide to industry standardization of proven concepts to be presented in a form most useful to pilots ( )

415.When the selector is in the 100% position, the user will( ) pure oxygen ( )

414.Turn the knob switch( )

413.让部件的温度下降直到其与周围的温度一致。( )