2942. All publications shall use the standard numbering system for indexing and assignment of subject matter prescribed in this specification even though all chapters may not be applicable to the aircraft or to the publication

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。

412. Unless the manufacturer＇s instructions tell you differently, do the procedure that fallows