ECS

Question 1

AIR CYCLE MACHINE (ACM)
•  Single ACM
•  3 sources of cabin flow and ventilation
   •  \_\_\_\_
   •  \_\_\_\_
   •  \_\_\_\_

Answer 1

AIR CYCLE MACHINE (ACM)
•  Single ACM
•  3 sources of cabin flow and ventilation
   •  Normal
   •  Alternate
   •  Ram air intake

Question 2

TEMPERATURE CONTROL
• AUTO – __ to __ degF
• MAN – __ to __ degF
• Cold air plenum regulated to __ degF (2 degC)
• Gaspers take air from ___ air plenum only

Answer 2

TEMPERATURE CONTROL
• AUTO – 60 to 90 degF
• MAN – 35 to 160 degF
• Cold air plenum regulated to 35 degF (2 degC)
• Gaspers take air from cold air plenum only

Question 3

DISTRIBUTION
• Separate ducting for gasper air, cabin and flight compartment
• Gasper air only from cold plenum, also cools aft R equipment rack
• Flight compartment – defog and pilot/Copilot air conditioning

Answer 3

DISTRIBUTION
• Separate ducting for gasper air, cabin and flight compartment
• Gasper air only from cold plenum, also cools aft R equipment rack
• Flight compartment – defog and pilot/Copilot air conditioning

Question 4

EQUIPMENT COOLING
• Nose bay – cooling fans (DIST BUS), ON when temp >___ degF (45 degC)
• CAS (cyan) – nose temp > __ degF (60 degC)
• CAS (Amber) – nose temp > __ degF for more than __ mins

Answer 4

EQUIPMENT COOLING
• Nose bay – cooling fans (DIST BUS), ON when temp >113 degF (45 degC)
• CAS (cyan) – nose temp > 140 degF (60 degC)
• CAS (Amber) – nose temp > 140 degF for more than 30 mins

Question 5

ALTERNATE PRESSURIZATION
• Bypass ____
• Primary from ___ Eng bleed (downstream from pre-cooler)
• Cooled by ___ heat exchanger (air expected to be hot) NACA scoop above R pylon
• Controlled by ______
• Can use ___ Eng through isolation valve

Answer 5

ALTERNATE PRESSURIZATION
• Bypass ACM
• Primary from R Eng bleed (downstream from pre-cooler)
• Cooled by ram air heat exchanger (air expected to be hot) NACA scoop above R pylon
• Controlled by AAPRSOV
• Can use L Eng through isolation valve

Question 6

RAM AIR
• Inlet scoop fwd base of _______
• Branch 1 - Primary and secondary ____ exchangers
• Branch 2 - Check valve at cold-air plenum, ventilation for low-altitude flights when primary and alternate pressurization not available
• Branch 3 - Ventilation for ____ and ____

Answer 6

RAM AIR
• Inlet scoop fwd base of vertical stabilizer
• Branch 1 - Primary and secondary heat exchangers
• Branch 2 - Check valve at cold-air plenum, ventilation for low-altitude flights when primary and alternate pressurization not available
• Branch 3 - Ventilation for aft fuselage and cabin

Question 7

NOTES
• AMSC (Air Management System Controller) Right Aft avionics cabinet – controls BAS, WAI and ECS
• PACK switch DIFF light when cabin differential pressure > 9.55 psi

Answer 7

NOTES
• AMSC (Air Management System Controller) Right Aft avionics cabinet – controls BAS, WAI and ECS
• PACK switch DIFF light when cabin differential pressure > 9.55 psi

Question 8

LIMITATIONS

• Hi flow on ground with ___ only

Answer 8

LIMITATIONS

• Hi flow on ground with APU only