AIRPLANE
OPERATIONS
MANUAL
PNEUMATICS
AIR CONDITIONING
AND PRESSURIZATION
JANUARY 21, 2002
2-14-15
Page
1
Code
01
PRESSURIZATION SYSTEM
The Cabin Pressure Control System (CPCS) controls the cabin
pressure by regulating the cabin air exhaust rate supplied by the
ECUs.
The CPCS comprises two subsystems:
- One digital electropneumatic subsystem(automatic mode).
- One pneumatic subsystem (manual mode).
Both subsystems comprise a digital controller, a manual controller, an
electropneumatic outflow valve, a pneumatic outflow valve, an air filter,
two pressure regulator valves, an ejector pump, two static ports, and a
Cabin Pressure Acquisition Module (CPAM).
Both outflow valves receive static pressure signals from static ports for
overpressure relief and negative pressure relief functions, actuating
pneumatic devices to inhibit airplane structural damage or injury in
case of improper system operation. The safety devices provide the
following features:
−
Positive cabin differential pressure relief: 8.2 psi maximum.
−
Negative cabin differential pressure relief: - 0.3 psi.
−
Cabin altitude limitation (when in the auto mode): 15000 ft maximum.
The system is normally operated in the automatic mode. The manual
mode is used in case of automatic mode failure.
The cabin air filter is provided to prevent nicotine and dust to enter the
outflow valve chamber.
Indications of cabin altitude, cabin differential pressure, and cabin
altitude rate of change are presented on the EICAS.
A caution message is presented on the EICAS in case of automatic
mode failure, requiring the crew to select the manual mode.
The CPAM and CPCS have internal tolerances of
±
100 ft and
±
200 ft,
respectively. Then, depending on these tolerances accumulation, the
displayed cabin altitude may be increased up to 300 ft. Although
displayed in the amber range for airplanes equipped with EICAS
version up to 16, it may not be considered an abnormal condition if
cabin altitude indication remains stabilized at or below 8300 ft.
If, however, the cabin altitude indication continuously increases and the
system is out of its normal range of operation, causing a cabin
depressurization, the CPAM sends a signal to the aural warning
system to alert the crew when cabin altitude is above 9900 ± 100 ft.
Summary of Contents for EMB145
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Page 614: ...ABNORMAL PROFILES AIRPLANE OPERATIONS MANUAL 1 03 97 Page 2 Code 01 REVISION 25...
Page 615: ...AIRPLANE OPERATIONS MANUAL ABNORMAL PROFILES DECEMBER 20 2002 1 03 97 Page 3 Code 01...
Page 616: ...ABNORMAL PROFILES AIRPLANE OPERATIONS MANUAL 1 03 97 Page 4 Code 01 DECEMBER 20 2002...
Page 622: ...PERFORMANCE AIRPLANE OPERATIONS MANUAL 1 04 03 Page 4 Code 01 REVISION 34 INTENTIONALLY BLANK...
Page 1000: ...LOADING AIRPLANE OPERATIONS MANUAL 1 07 10 Page 4 Code 40 JUNE 28 2002 EMB 145 DOOR CLEARANCES...
Page 1070: ...AIRPLANE OPERATIONS MANUAL LOADING DECEMBER 20 2002 1 07 80 Page 3 Code 01...
Page 1072: ...AIRPLANE OPERATIONS MANUAL LOADING DECEMBER 20 2002 1 07 80 Page 5 Code 01...
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Page 1718: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL MARCH 28 2002 2 05 10 Page 3 Code 01 CONFIGURATION 1...
Page 1720: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL REVISION 22 2 05 10 Page 5 Code 01 CONFIGURATION 2...
Page 1724: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL REVISION 23 2 05 10 Page 6C Code 01 CONFIGURATION 3A...
Page 1726: ...AIRPLANE OPERATIONS MANUAL ELECTRICAL REVISION 26 2 05 10 Page 7 Code 01 CONFIGURATION 3B...
Page 1766: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 05 Page 3 Code 01 COCKPIT LIGHTING...
Page 1768: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 05 Page 5 Code 01 GLARESHIELD PANEL...
Page 1770: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 05 Page 7 Code 01 OVERHEAD PANEL...
Page 1786: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 15 Page 7 Code 01 OVERHEAD PANEL...
Page 1792: ...AIRPLANE OPERATIONS MANUAL LIGHTING JANUARY 21 2002 2 06 20 Page 5 Code 01 OVERHEAD PANEL...
Page 1827: ...FUEL AIRPLANE OPERATIONS MANUAL 2 08 00 Page 2 Code 01 REVISION 17 INTENTIONALLY BLANK...
Page 1940: ...AIRPLANE OPERATIONS MANUAL POWERPLANT JUNE 28 2002 2 10 70 Page 5 Code 01 THRUST REVERSER...
Page 2030: ...AIRPLANE OPERATIONS MANUAL FLIGHT CONTROLS REVISION 19 2 13 20 Page 3 Code 01 RUDDER SCHEMATIC...
Page 2052: ...AIRPLANE OPERATIONS MANUAL FLIGHT CONTROLS REVISION 18 2 13 30 Page 3 Code 01 FLAP SCHEMATIC...
Page 2060: ...AIRPLANE OPERATIONS MANUAL FLIGHT CONTROLS JUNE 29 2001 2 13 35 Page 5 Code 01 CONTROL STAND...
Page 2159: ...AIRPLANE OPERATIONS MANUAL OXYGEN OCTOBER 02 2001 2 16 10 Page 3 Code 01 MAIN OXYGEN CYLINDER...
Page 2160: ...OXYGEN AIRPLANE OPERATIONS MANUAL 2 16 10 Page 4 Code 01 OCTOBER 02 2001 OXYGEN SERVICE PANEL...
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