Air Conditioning/Pressurization/Ventilation/Pneumatic

Question 1

X BLEED selector AUTO:

Answer 1

AUTO: Auto logic controls opening and closing of the crossbleed valve:

crossbleed valve commanded open when the APU bleed valve is open
crossbleed valve commanded closed when the APU bleed valve is closed
crossbleed valve commanded closed when a bleed leak is detected

Question 2

Recall the indications of external high-pressure air being applied to the pneumatic system

Answer 2

With no internal air source being provided ( i.e. APU or engine bleed air), a PSI value is displayed on the left side of the ECAM
BLEED page. By default, the air source must be an external high-pressure air cart.

Question 3

Recall the indications of the Engine Bleed Valves and HP (High Pressure) valves on the ECAM BLEED page.

Answer 3

Engine bleed valves are depicted next to the respective engine’s number (1 and 2) on lower portion on the page

HP valves are depicted on the lower portion of the page next to the white HP designator

NOTE: IP (Intermediate Pressure) check valves are not specifically depicted but are represented by a white IP designator

Question 4

Recall the indications when APU bleed air is in use.

Answer 4

APU bleed valve indicates open on the ECAM BLEED page.

APU BLEED is displayed in green on the memo section of the E/WD.

Question 5

Recall the areas of the aircraft where a bleed air leak can be detected

Answer 5

Wings: each wing’s bleed air duct

Engine pylons: area from the engine to the respective wing bleed duct

Aft fuselage: area surrounding the APU bleed air duct

Question 6

Recall the indications and effects of Primary OR Secondary Zone Controller channel failures:

Answer 6

• *o Primary channel failure:**
• ALTN MODE appears at the top of the ECAM COND page.
• Secondary channel operates as backup.
• Flow setting function and optimized temp function are not available.
• HOT AIR and TRIM AIR valves close.
• *o Secondary channel failure:**
• Has no effect on zone temperature regulation.
• Backup mode is lost. Temperature indications are lost.

Question 7

Recall the indications and effects of BOTH Primary AND Secondary Zone Controller channel failures:

Answer 7

 PACK REG appears at the top of the ECAM COND page.

• Removes all information from ECAM COND page.
• Optimized and backup temperature regulation lost - Packs deliver a fixed temperature.

Question 8

Recall the effect of Air Condition Pack Controller channel failures.

Answer 8

Primary channel failure:
▪ Secondary channel operates as backup.
- Pack flow is fixed at previous setting.

Secondary channel failure:
▪ Has no effect on pack flow regulation.
- Backup mode is lost.
- ECAM signals related to corresponding pack are lost

Primary and Secondary channel failure:
▪ Pack outlet temperature is controlled by the anti-ice valve.
- Outlet temperature is stabilized
- ECAM signals related to the pack are lost

Question 9

AVIONICS SMOKE Configuration

Answer 9

Placing the BLOWER and EXTRACT pbs to OVRD (white):

• allows additional air from the air conditioning system to enter the compartment
• forces all air within the compartment overboard

NOTE: FAULT appears on the BLOWER and EXTRACT pb as the result of smoke being detected in the avionics compartment.

Question 10

DITCHING pb ON:

Answer 10

Closes: (PARO)
Pack flow control valves
Avionics ventilation inlet and outlet valves
Ram air inlet
Outflow valve

Question 11

Recall, in the event the flight must return to the departure airport immediately after takeoff, what pressurization system action must be taken by the pilot.

Answer 11

No action is required (Abort mode)

Question 12

CABIN PRESS MODE SEL pb ON:

Answer 12

Enables use of the MAN V/S CTL toggle switch to manually control the outflow valve.

NOTE: Pressurization system performance can be monitored on either the ECAM CAB PRESS or Cruise page.

Question 13

MAN V/S CTL toggle switch:

Answer 13

MAN V/S CTL toggle switch:
 UP commands the outflow valve open, reducing cabin pressure – increasing cabin’s altitude- “taking the cabin

up”.
 DN commands the outflow valve closed, increasing cabin pressure – decreasing cabin’s altitude- “taking the cabin down”.

NOTE: Pressurization system performance can be monitored on either the ECAM CAB PRESS or Cruise page.

Question 14

Describe the function of the LDG ELEV selector.

Answer 14

o In AUTO (detent) position:

 FMGCs provide the pressurization system with the landing field elevation.

o Outside of AUTO (turning clockwise):
 Landing field elevation is set manually.
 Used when both FMCGs have failed or when landing airport is not in the FMS data base.

NOTE: Selector is calibrated in thousands, not hundreds of feet.

Question 15

Describe how the active and standby pressurization controllers (CPCs) switch roles.

Answer 15

Automatically: shortly after landing
In the event the active CPC fails

Manually: Place MODE SEL pb to MAN for 10 seconds, then back to AUTO

Question 16

Recall how many Cabin Pressure Controllers are installed and where the active system is displayed on ECAM.

Answer 16

2 CPC’s
Designated as SYS 1 and SYS 2, current active system viewed on ECAM CAB PRESS page

Question 17

Recall which cargo compartment is heated and ventilated.

Answer 17

Only the aft cargo compartment is temp controlled, using CARGO HEAT panel on the overhead

Can be monitored by referencing the ECAM COND or CRUISE page

Question 18

Recall which areas of the wings and engines are provided ice protection.

Answer 18

Wings – outboard three slats (Slats 3, 4, and 5)

Engines – engine nacelle leading edge.

Question 19

Recall whether an engine’s bleed valve must be open to use its engine anti-ice system.

Answer 19

No. Engine anti-ice is plumbed independently from the high- pressure compressor therefore, the engine’s bleed valve does not have to be open to use engine anti-ice.

Question 20

ANTI ICE ENG pb ON:

Answer 20

ON, ENG A.ICE and IGNITION appear on the E/WD memo section

Question 21

ANTI ICE WING pb ON:

Answer 21

ON, WING A. ICE (green) appears on the E/WD memo section.
▪ ANTI ICE (white) appears on each side of the BLEED page.
▪ON (blue) illuminates on WING pb

Question 22

ANTI ICE pb FAULT:

Answer 22

ENG & WING
- momentarily appears during valve transition.
- disagreement between valve selected position and actual position
- also for WING: low bleed air pressure detected

Question 23

PROBE/WINDOW HEAT pb AUTO:

Answer 23

on ground with at least 1 engine running: pitot/static, AOA and windows except TAT heated at low heat

airborne: pitot/static, AOA, windows and TAT heated at higher level

Question 24

PROBE/WINDOW HEAT pb ON:

Answer 24

on ground with engines not running: all probes and windows except TAT heated at low heat