Pressurisation

Question 1

If an OCU fails, what happens

Answer 1

If one OCU (Outflow valve Control Unit) fails the other one takes over the control of the two outflow valves.

Question 2

Outflow valves close in AUTO

Answer 2

The two outflow valves close when the cabin altitude exceeds 14 000 ft in automatic mode (15 000 ft in manual mode)

Question 3

When do the outflow valves close in MANUAL mode?

Answer 3

The two outflow valves close when the cabin altitude exceeds 15 000 ft in manual mode.

Question 4

Cabin v/s displayed where?

Answer 4

CRUISE Page
CAB PRESS SD page
DOOR/OXYGEN SD PAGE

Question 5

Pressurisation Abort Mode

Answer 5

If the aircraft does not climb after takeoff, the cabin altitude will automatically stop climbing, when:
The aircraft is at takeoff phase or climb phase
The aircraft altitude is less than 5 000 ft above the aircraft altitude at takeoff
The aircraft vertical speed is less than + 250 ft/minfor 30 s.

Question 6

If ditching PB is pressed, what valves don’t close?

Answer 6

Engine Bleed Valves. (The DITCHING pb-sw closes all the valves, inlets and outlets located below the flotation line: outflow valves, avionics overboard valve, cargo isolation valves, pack valves, pack ram air inlet and outlet, emergency ram air inlet.)

Question 7

What SD pages show avionics ventilation details?

Answer 7

CAB PRESS SD PAGE

COND SD Page