PRESSURISATION Flashcards
HOW DOES PRESS WORK
CABIN AIR PRESS REGULATION IS DONE VIA THE AUTO CONTROL OF THE OUTFLOW VALVES DURING ALL FLT PHASES
HOW MANY OUTFLOW VALVES
4 OUTFLOW VALVES
2 FWD 2 AFT
EACH OUTFLOW VLV DRIVEN BY SINGLE ELEC MOTOR
HOW MANY OUTFLOW VLV CONTROLLERS
4 OUTFLOW VLV CONTROLLERS
ONE FOR EACH OUTFLOW VLV
OPERATE IN AUTO MODE BACKUP OR MANUAL
OUTFLOW VLV CONTROLLER
AUTO MODE
ALL 4 AUTO MANAGE CABIN ALT AND CABIN V/S
IF AUTO MODE OF 3 FAIL 1 CAN STILL CONTROL ALL OUTFLOW VLV
OUTFLOW VLV CONTROLLERS RECEIVES DATA FROM
AFDX NETWORK FMS FLT PLAN NAV SYS ADIRS LDG GEAR ENGINES AIRCOND DOORS
PSI FOR TAKEOFF AND CRZ
AUTO MODE
TAKEOFF 0.1 PSI
CRZ APPROX 8 PSI
AUTO OUTFLW VLV CTL
BEFORE TAKEOFF ROLL
ALL OUTFLW VLV OPEN TO MAKE SURE THAT THERE IS NO DIFFERENTIAL PRESS BETWEEN THE INSIDE AND OUTSIDE OF THE AIRCRAFT
AUTO CTL MODE OUTFLW VLV CNTRLR
DURING TAKEOFF ROLL
4 OUTFLW VLV CONTROLLERS PRESSURISE THE AIRCRAFT TO PROVIDE A SMOOTH VARIATION OF THE CABIN V/S AFTER LIFTOFF
DURING CLIMB IN NAV
CLIMB ALT PROFILE AND VS FUNCTION OF AIRCRAFT FLT PROFILE
DURING CLIMB HDG
CABIN ALT AND VS FUNCTION OF AIRCRAFT ALT AND VS
CABIN VS LIMITED 1000fpm
CRUISE CABIN ALT
APPROX < 7500’
DIFF PRESS 8 PSI
CABIN ALT FOR DES
CABIN VS CONTROLLED TO MAKE SURE THAT THE CABIN ALT REACHES AN ALT SLIGHTLY BELOW LDG FIELD ELEV PRIOR LDG
CABIN VS LIMITED -300fpm FOR DESCENT
AFTER LDG
WHAT HAPPENS OUTFLW VLV
ALL OUTFLOW VLV OPEN
IF ALL OUTFLW VLV CONTROLLERS FAIL
CAN BE OPERATED IN MANUAL MODE
FMS DATA IS LOST
USE CABIN PRESS INFO FROM ASSIGNED PRESS SENSORS AND EXTERNAL PRESS INFO
CABIN VS
MANUAL
ONLY USED SMOKE FUMES REMOVAL
CABIN ALT SEL
MANUAL MODE
HAS PRIORITY OVER SEL VS
WITH CABIN ALT MANUAL VS MUST BE AUTO UNLESS DUE ECAM
CABIN ALT MANUAL ROC ROD
ROC 500fpm
ROD -300fpm
DITCHING PBSW
CLOSES ALL VALVES BELOW FLOTATION LINE
BOTH AUTO AND MANUAL FAILS FOR ONE OUTFLW VLV CTRLR
RELATED OUTFLW VLV AUTO CLOSES
NO OPERATIONAL IMPACT
NEGATIVE PRESS RELIEF VLV
AFT PRESS BULKHEAD
OPERATE MECH TO PREVENT EXCESSIVE NEGATIVE DIFF PRESS
NOT SHOWN CAB PRESS SD
CABIN AIR EXTRACT VLV
2 CABIN AIR EXTRACT VALVES AFT PRESS BULKHEAD
PNEUMATICALLY OPERATE TO PREVENT POSITIVE OR NEG PRESS
CAN BE MANUALLY OPENED FOR SMOKE FUMES
ONLY 1 SHOWN CAB PRESS SD
CAB AIR EXTRACT PBSW PART AIRCOND PANEL
VENTILATION SYS FULLY AUTO FOR
AVIONICS BAY
COCKPIT AND CABIN ZONES
IFE BAY
FWD CARGO COMPT
PACK BAYS
BULK AND AFT CARGO COMPT
THS BAY (cooled by assigned and fully auto vent sys)
VENTILATION CONTROLLERS
FWD AND AFT
2 IND CHANNELS
NOT SHOWN COND SD UNLESS FAULT
VENT SYS AVIONICS
HAS ASSIGNED CONTROLLER
COOLS COCKPIT PANELS MAIN AND UPPER AVIONICS BAYS
2 AVIONICS VENT CCTS L AND R
AVIONICS VENT SYS
ON GND
AVIONICS GND COOLING SYS COOLS THE AIR THAT IS BLOWN IN THE TWO VENT CCTS
NOT SHOWN COND SD UNLESS FAULT
BLOWER FANS
TWO FANS BLOW RECIRC AIR FROM CABIN INTO VARIOUS PANELS AND EQUIP RACKS
EACH AVIONICS CCT HAS ITS OWN BLOWER FAN
BOTH BLOWER FANS AUTO ON WHEN AIRCRAFT ELEC POWERED
AVIONICS EXTRACT FAN
A FAN EXTRACTS AIR FROM THE AVIONICS BAY AND COCKPIT PANELS THROUGH EITHER THE OVERBOARD VLV OR EXTRACT VLV FOR DISCHARGE OVERBOARD
FOR EG
AIR IS DISCHARGED THROUGH THE EXTRACT VLV AND THEN OVERBOARD THROUGH THE OUTFLW VLVS BY DIFF PRESS
EXTRACT FAN AUTO WHEN AIRCRAFT ELEC PWR
BLOWING FANS NOT VENT CORRECTLY
BACKUP VLV OF AFFECTED CCT AUTO OPENS TO SUPPLY COLD AIR FROM AIRCOND SYS MIXER UNIT
ON GND
ENGINES NOT RUNNING
OVERBOARD VLV FULLY OPEN
EXTRACT VLV CLOSED
BOTH INNER ENGINES RUNNING
OVERBOARD VLV CLOSES
EXTRACT VLV OPENS
AIR DISCHARGED OVERBOARD THROUGH OUTFLW VLV BY DIFF PRESS
OVRD CONFIG FOR EG SMOKE
OVERBOARD VLV PARTIALLY OPENS
EXTRACT VLV AUTO CLOSES
AIR EXTRACTED AND DISCHARGED THROUGH OVERBOARD VLV AND DIFF PRESS
SOME AREAS
AFT AVIONICS
LAV GALLEY
STAIRCASES
VENTILATED
ON GND
TWO EXTRACT FANS THAT DRAW AIR AND DISCHARGE IT OVERBOARD THROUGH OUTFLW VALVES
IN FLT
BY DIFF PRESS THROUGH AIR OUTLETS
VENT
IFE BAY
OWN BLOWER FAN
AUTO WHEN AC ELEC PWRED
AIR EXTRACTED AND DISCHARGED THROUGH OUTFLW VLV AND DIFF PRESS
IF BLOW FANS INSUFF OR FAILS A BACKUP VLV AUTO OPENS TO SUPPLY COLD AIR FROM AIRCOND MIXER UNIT
VENT
PACK BAYS
BOTH VENT BY EXTERNAL AIR
ON GND
2 PNEUMATICALLY OPERATED BLOWING FANS
ONE PER PACK
BLEED AIR FROM ANY SOURCE FLOWS THROUGH 2 SUPPLY VALVES AND DRIVES BOTH FANS.
PACK CONTROLLER CONTROLS BLOWING FANS
IN FLT
BY EXTERNAL AIR FROM INLETS IN BELLY FAIRING
VENT PANEL
COOLG
CONTROLS BOTH THE SUPPLEMENTAL COOLING SYS AND AVIONICS GROUND COOLING SYS
