Pneumatics

Question 1

AIR MANAGEMENT SYSTEM CONTROLLER (AMSC)
• Aft ___ Equipment Rack
• Bleed air from __ and __
• High Stage Valve - Spring loaded ___, electrically commanded ____, modulated as required
• MPRSOV - Electrical power to operate, fail ____, pneumatically ____

Answer 1

AIR MANAGEMENT SYSTEM CONTROLLER (AMSC)
• Aft R Equipment Rack
• Bleed air from IP and HP
• High Stage Valve - Spring loaded close, electrically commanded open, modulated as required
• MPRSOV - Electrical power to operate, fail close, pneumatically opened

Question 2

AIR MANAGEMENT SYSTEM CONTROLLER (AMSC)
• Pre-cooler – Hot bleed air cooled by modulated ____
• Pre-cooler outlet set point
o Normal ___ degF
o Normal WAI on ___ degF
o Single bleed WAI on ___ degF (max 26000ft)

Answer 2

AIR MANAGEMENT SYSTEM CONTROLLER (AMSC)
• Pre-cooler – Hot bleed air cooled by modulated fan air
• Pre-cooler outlet set point
o Normal 400 degF
o Normal WAI on 450 degF
o Single bleed WAI on 500 degF (max 26000ft)

Question 3

EXTERNAL AIR

• _______ required to actuate isolation valve and Pack Inlet Valve (PIV)

Answer 3

EXTERNAL AIR

• Electrical power required to actuate isolation valve and Pack Inlet Valve (PIV)

Question 4

APU
• APU air available when -
• Pressurization up to -
• In-flight engine start up to -

Answer 4

APU
• APU air available when - 95% RPM + 90secs
• Pressurization up to - 20,000ft
• In-flight engine start up to - 15,000ft

Question 5

LIMITATIONS
• Max cabin diff for taxi, TO and landing -
• Max cabin diff -

Answer 5

LIMITATIONS
• Max cabin diff for taxi, TO and landing = 0.2 psid
• Max cabin diff = 9.2 psid