指挥员在航空器推出过程中，（）机组起动飞机发动机

52.Install the seatbefore you install the cushion

51.Connect the disconnected wires.

50.CAUTION:WHEN YOU REMOVETHE PROBES,DO NOT LETTHEMTOUCH EACHOTHER

49.Set the rotary switch to INPUT

48.Cracks canhavea maximum length offive inches.

47.Makesurethat there areno leaks.

46.To remove thecover assembly(9),firstremove the four screws(10).

45.Polish the window pane with a soft cloth.

44.All personnel must fully know the safety precautions.

43.Donot exceed this speed with landing gear extended