575.What is the maximum normal cabin altitude for maximum cruise level(39000Ft)

86.The passenger door is maintained parallel to the fuselage by :

85.When is the drain tank emptied ?

84.On ground, in case of failure, how can you open or close the air intake flap ?

83.Normal APU shutdown is performed from ?

82.From where can an APU emergency shut down be performed ?

81.What is the main function of the APU ?

80.The starter motor assists the APU up to which speed ?

79.APU is running and APU bleed air system is in use. What happens if APU MASTER SW pushbutton is released out ?

78.When does the APU air intake flap open ?

77.When does the bleed load valve regulate ?