03_21-20 Pressurization
21-20 Pressurization
21-20 Pressurization
4 functions of the Pressurization system:
a) ground function b) Pressurization c) Pressurization in flight d) Depressurization
CPC
two Cabin pressure Controllers
RPCU
one Residual Pressure Control Unit
FMGS
FMGS (Flight Management and Guidance System
- AUTO Mode: signals from the
• AUTO Mode: signals from the FMGS (Flight Management and Guidance System) ==> Not available = select the landing filed elevation
ADIRS
ADIRS (Air Data Inertial Reference System)
FMGC
FMGC (Flight Management and Guidance Computer),
EIU
EIU (Engine Interface Unit)
- LGCIU
LGCIU(Landing gear control interference Unit)
- Cabin pressure controllers: receive signals from the a,b,c,d
• Cabin pressure controllers: receive signals from the ADIRS (Air Data Inertial Reference System), FMGC (Flight Management and Guidance Computer), EIU (Engine Interface Unit) and LGCIU(Landing gear control interference Unit)
Outflow valve: the actuators contains the drives of the
- Outflow valve: the actuators contains the drives of the 2 automatic motors and the manual motor
- In the manual mode, the backup section of N1 controller signals the position of the valve to the ECAM
- under manual control, the outflow valve doesn’t automatically open, even if P below 1 Psi
Safety valves: ab wand offen und wie viele?
Safety valves: 2 independent => over 8 psi or -1psi
RPCU: macht was?
- RPCU: residual pressure control unit automatically depressurize the aircraft in case of abnormal residual pressure on ground
Switch between the 2 CPC:
70s after each ldg or one fails
CPC: max. xy ft?
CPC: max. 8000 ft => ldg elevation and the QNH from the FMGC and the pressure altitude from ADIRS => FMGC not available => captains BARO reference
Pressurization flight profil
vgl. Bild
special by Auto Mode:
A)
B)
special by Auto Mode:
A) due to slow operation of the outflow valves in manual mode => ECAM indications up to 5s
B) outflow valve does not open automatically at touchdown
Change from MAN to AUTO mode: at leat
Change from MAN to AUTO mode: at leat 10 seconds in the MAN Mode than back to the AUTO
MAN V/S CTL toggle switch: Up? Down?
UP: the valves moves towards the open position, differential pressure nimmt ab, V/S + Cabin ALt steigt
DOWN: the valves moves towards the closed position, differential pressure nimmt zu, V/S + Cabin Alt sinkt
the outflow valve will not close automatically, if its is under
the outflow valve will not close automatically, if its is under manual control
1)LDG ELEV AUTO/MAN: was wird wann wie angezeigt?
LDG ELEV AUTO: appears in green when LDG ELEV selecetor is AUTO
LDG ELEV MAN: appears in green when LDG ELEV selecetor is not in AURO
==> NEITHER appears when the MODE SEL pb switch is in MAN
3) when they appears in amber?
appears in amber when V/S grösser oder Gleich 2000ft/min
4) when they appears in amber?
differential pressure kleiner/Gleich als -0,4 psi oder grösser/Gleich 8.5 Psi
5) when they appears in red?
above 9500ft
7) the safefty valve opens when cabin differential pressure is between
8.2 and 8.9 PSI => The range is due to the reduced accuracy of differential pressure measurements in MAN mode
8) when becomes the diagram amber?
when the valve opens more than 95% during flight
when becomes 1 amber?
when V/S is greater than 2000 ft/min or less than -2000ft/min
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Flashcards
4 functions of the Pressurization system:
a) ground function b) Pressurization c) Pressurization in flight d) Depressurization
CPC
two Cabin pressure Controllers
RPCU
one Residual Pressure Control Unit
FMGS
FMGS (Flight Management and Guidance System
- AUTO Mode: signals from the
• AUTO Mode: signals from the FMGS (Flight Management and Guidance System) ==> Not available = select the landing filed elevation
ADIRS
ADIRS (Air Data Inertial Reference System)
FMGC
FMGC (Flight Management and Guidance Computer),
EIU
EIU (Engine Interface Unit)
- LGCIU
LGCIU(Landing gear control interference Unit)
- Cabin pressure controllers: receive signals from the a,b,c,d
• Cabin pressure controllers: receive signals from the ADIRS (Air Data Inertial Reference System), FMGC (Flight Management and Guidance Computer), EIU (Engine Interface Unit) and LGCIU(Landing gear control interference Unit)
Outflow valve: the actuators contains the drives of the
- Outflow valve: the actuators contains the drives of the 2 automatic motors and the manual motor
- In the manual mode, the backup section of N1 controller signals the position of the valve to the ECAM
- under manual control, the outflow valve doesn’t automatically open, even if P below 1 Psi
Safety valves: ab wand offen und wie viele?
Safety valves: 2 independent => over 8 psi or -1psi
RPCU: macht was?
- RPCU: residual pressure control unit automatically depressurize the aircraft in case of abnormal residual pressure on ground
Switch between the 2 CPC:
70s after each ldg or one fails
CPC: max. xy ft?
CPC: max. 8000 ft => ldg elevation and the QNH from the FMGC and the pressure altitude from ADIRS => FMGC not available => captains BARO reference
Pressurization flight profil
vgl. Bild
special by Auto Mode:
A)
B)
special by Auto Mode:
A) due to slow operation of the outflow valves in manual mode => ECAM indications up to 5s
B) outflow valve does not open automatically at touchdown
Change from MAN to AUTO mode: at leat
Change from MAN to AUTO mode: at leat 10 seconds in the MAN Mode than back to the AUTO
MAN V/S CTL toggle switch: Up? Down?
UP: the valves moves towards the open position, differential pressure nimmt ab, V/S + Cabin ALt steigt
DOWN: the valves moves towards the closed position, differential pressure nimmt zu, V/S + Cabin Alt sinkt
the outflow valve will not close automatically, if its is under
the outflow valve will not close automatically, if its is under manual control
1)LDG ELEV AUTO/MAN: was wird wann wie angezeigt?
LDG ELEV AUTO: appears in green when LDG ELEV selecetor is AUTO
LDG ELEV MAN: appears in green when LDG ELEV selecetor is not in AURO
==> NEITHER appears when the MODE SEL pb switch is in MAN
3) when they appears in amber?
appears in amber when V/S grösser oder Gleich 2000ft/min
4) when they appears in amber?
differential pressure kleiner/Gleich als -0,4 psi oder grösser/Gleich 8.5 Psi
5) when they appears in red?
above 9500ft
7) the safefty valve opens when cabin differential pressure is between
8.2 and 8.9 PSI => The range is due to the reduced accuracy of differential pressure measurements in MAN mode
8) when becomes the diagram amber?
when the valve opens more than 95% during flight
when becomes 1 amber?
when V/S is greater than 2000 ft/min or less than -2000ft/min
