Systems AIR

Question 1

How many IASC Integrated Air System Controllers

Answer 1

2
FCOM 1 02-02-12

Question 2

Each IASC is composed of

Answer 2

3 Channels
A B and Safety Channel C
FCOM 1 02-02-12

Question 3

IASC 1 controls

Answer 3

Left Engine Bleed Air Valve
L ENG High Pressure Valve
L ENG Fan Air Valve
APU Bleed Valve
Cross Bleed Valve
Left Wing Anti-Ice Valve
FCOM 1 02-02-12

Question 4

IASC 2 controls

Answer 4

Right Engine Bleed Air Valve
R ENG Hi Pressure Valve
R ENG Fan Air Valve
R Wing Anti-Ice Valve
FCOM 1 02-02-12

Question 5

List uses of Bleed Air

Answer 5

AIR CON & Pressurisation
Cowl and Wing Anti-Ice
Main Eng Start
Fuel Inerting
FCOM 1 02-02-1

Question 6

Integrated Air Management System IAMS includes which systems

Answer 6

Bleed Air System
Bleed Air Leak and Overheat Detection System BALODS
Air Con system
Avionics cooling and Heat extraction system
Pressurisation system
FCOM 1 02-01-1

Question 7

In what situation on the ground can the AIR synoptic page indicate L and R bleed pressure varying between 9-16 PSI instead of 0 PSI

Answer 7

Without Bleed Air connected and while on BATT Power only.
FCOM 1 02-02-3

Question 8

When will the IASC use Engine Bleed Air priority over APU bleed Air, if both are available.

Answer 8

When Wing Anti-Ice active or On, Aircraft Inflight and Clean and above 16,500 ft. Otherwise APU Bleed is used.
FCOM 1 02-02-15

Question 9

What does CYAN EICAS message LEAK DET FAULT indicate

Answer 9

Single Loop Leak Detection Failure
FCOM 1 02-02-22

Question 10

How many AIR CON flow modes are there

Answer 10

2. Automatic and HIGH Flow
   AUTO based on number of Pax entered in FMS
   HIGH Flow automatically selected when necessary (APU operation on ground, high or low mix duct temp) can be manually selected with PACK FLOW switch on AIR panel
   FCOM 1 02-03-7

Question 11

What is the function of the Trim Air System

Answer 11

Supplies additional hot bleed air through 4 Trim Air Valves. One for each air-conditioned zone
FCOM 1 02-03-11

Question 12

Which temperature is controlled by the IASC when MAN TEMP is selected

Answer 12

Duct temperature instead of zone
FCOM 1 02-03-18

Question 13

Approximately what percentage of Cabin Air is recirculated

Answer 13

35-40%
FCOM 1 02-03-22

Question 14

What does Cyan message EQUIP BAY COOL FAULT indicate

Answer 14

Loss of redundant or non critical function for the Air Con system
FCOM 1 02-03-48

Question 15

Explain pressurisation system Return to Base Mode

Answer 15

Begins if A/C descends at a rate >500ft/min for more than 10secs within 10 minutes of TO or before reaching 5000ft above Field Elevation. IASC depressurises to Field Elevation
FCOM 02-04-7

Question 16

What altitude does the AC descend to if the guarded EMER DEPRESS switch is pushed

Answer 16

15,000 ft or the AC altitude, whichever is lower
FCOM 02-04-10

Question 17

Which valves are closed by the Guarded DITCHING switch

Answer 17

Avionics Exhaust Valve AEV
Flow Control Valve FCV
Trim Air Pressure Regulating Valve TAPRV
Bulkhead Check Valve
Outflow Valve OFV which is closed last
FCOM 1 02-04-11

Question 18

Which Valve needs to be manually closed when the DITCHING switch is pushed

Answer 18

RAM AIR valve
FCOM 1 02-04-11

Question 19

Bleed Air Leak and Overheat Detection System BALODS detects leaks in

Answer 19

Bleed Air manifold L/R
Wing Anti-Ice manifold L/R
Air Con packs and manifolds
Trim Air manifolds
APU bleed air manifold

Both Dual Loops must detect leak to trigger alert
FCOM 1 02-02-15

Question 20

Main components of Pressurisation System are

Answer 20

Outflow Valve OFV (mid aircraft behind Fwd Cargo)
2x Safety Over/Under Pressure Relief Valves (Rear Bulkhead)
Negative Pressure Relief Valve NPRV (Rear Bulkhead)
Pressure Equalisation Valves (Each Cargo CMPT has a Large and Small PEV)
FCOM 1 02-04-1

Question 21

MANUAL Pressurisation activated when AUTO PRESS switch is pushed. The rates are

Answer 21

12 o’clock 0 ft/min
9 o’clock and 3 o’clock -1,000 and +1,000 ft/min
9 o’clock and Dn and 3 o’clock and UP between -/+1,000 to -/+2,500 ft/min
FCOM 1 02-04-8

Question 22

The FWD CARGO switch on the AIR panel has 4 settings

Answer 22

OFF Not vented not heated
LO HEAT 15-20 deg
HI HEAT 20-25 deg
VENT Ventilation only 4-25 deg
FCOM 1 02-03-19/35

Question 23

Flight Crew can select what range of temperatures in Manual mode

Answer 23

COCKPIT, FWD CABIN & AFT CABIN
Cold 18 deg
Hot 30 deg
Centre position 24 deg
FCOM 1 02-03-33

Question 24

The engine bleed air system has which components

Answer 24

Intermediate Pressure Check Valve IPCV
High Pressure Valve HPV
Pressure Regulating Shut Off Valve PRSOV
Fan Air Valve FAV
Bleed Temperature Sensor BTS
Precooler
FCOM 1 02-02-6

Question 25

What are the primary sources of pneumatic power for the aircraft

Answer 25

4th or 8th stage engine compressor FCOM 1 02-02-6

Question 26

The Intermediate Pressure Check Valve prevents

Answer 26

Backflow to the engine when the HPV is open FCOM 1 02-02-7

Question 27

The High Pressure Valve HPV lets 8th stage bleed air flow when

Answer 27

Thrust settings are low or when demand is too high for the 4th stage FCOM 1 02-02-7

Question 28

The Pressure Regulating Shut Off Valve PRSOV maintains a constant pressure to the bleed manifold of approximately

Answer 28

45 psi FCOM 1 02-02-7

Question 29

The Fan Air Valve FAV directs cooling fan section air to the

Answer 29

Bleed Air Precooler FCOM 1 02-02-7

Question 30

The Bleed Temperature Sensor downstream of the precooler sends temperature information to the IASC to adjust the

Answer 30

Fan Air Valve FAV FCOM 1 02-02-8