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Flashcards in ECS/PNEUMATICS/ICE AND RAIN Deck (26)
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1

What is HP?

High Pressure Bleed air.

2

What is IP bleed air used for?

Air conditioning and pressurization.

3

What pressure is IP regulated to?

50 psi

4

What is HP bleed air used for?

Wing and engine anti-ice.

5

What pressure is HP bleed air regulated to?

36 psi.

6

What are IASC's?

Integrated Air System Controllers (2 installed IASC 1 and IASC 2)

** Each IASC has 2 Channels (A + B)

7

What is IP?

Intermediate Pressure Bleed air

8

What do the IASC's monitor?

#1 IASC monitors the Left IP and HP bleed valves
** Channel A monitors ECS and Pressurization
** Channel B Monitors Wing Anti Ice and Leak Protection

#2 IASC monitors the Right IP and HP bleed valves
** Channel A monitors ECS and Pressurization
** Channel B Monitors Wing Anti Ice and Leak Protection

9

Why would you select manual temperature?

It gives you a wider temperature selection range.

AUTO: 15-35 degree temp. range
MANUAL: 3-70 degree temp. range


10

Wing temperature sensors closer to the wingtips measure what?

Underheat.

11

Wing temperature sensors closer to the fuselage measure what?

overheat.

12

In what position do wing anti ice valves fail?

They fail closed.

13

When is T2 heated?

T2 is heated electrically when the engine anti ice is selected to ON.

14

Max Runway contamination depth?

.5"

15

What kind of air comes out of the gaspers?

ALL COLD AIR.

16

On the ground, when do you use engine anti ice?

OAT 10 degrees or less in visible moisture or on contaminated surfaces.

17

On the ground, when do you turn on wing anti ice?

OAT is 5 degrees C or less in visible moisture. (If de-iced with Type II or IV, delay turning on wing anti ice to just prior to thrust increase for takeoff)

18

When do you turn on Engine anti ice on in flight?

When TAT is 10 C (to -40 C) in visible moisture or a CAS ICE DETECTED message.

19

When do you turn on WING anti ice on in flight?

When the TAT is 10 C (to -40 C) in visible moisture, the airspeed is below 210 KIAS or anytime an amber ICE DETECTED CAS message is displayed.

20

Sequence for transferring the bleeds from APU to Engines

X BLEED closed, L BLEED ON, APU BLEED OFF, R BLEED ON.

**Opposite for transferring from Engines to APU.

21

When the L (R) PROBES switches are selected ON, the following probes/sensors are heated:

- Left and right standby static ports
- Left and right AOA sensors
- Left and right Pitot-Static probes
- TAT probe
- Standby Pitot probe

22

What happens when you select TRIM AIR ONLY on the ECS panel?

Opens Right Flow Control Valve
Closes Left Flow Control Valve
Closes the Pre-cooler Crossover Valve (PCV)
TRIM AIR ONLY CAS msg displayed

23

What is the purpose of waiting 2 minutes before commencing the anti-ice test?

To allow the low temperature sensors in the wing tips to detect sufficient heat.

24

An Amber (L/R) BLEED LOOP FAIL EICAS message indicates:

Both Loops of a dual-loop zone are inoperative.

25

Normal cabin and cockpit temperature control is accomplished by:

Hot Air Regulating Shutoff Valves (HARSOVs) modulating hot Trim Air through injectors.

26

When the Air Source Selector switch is selected to TRIM AIR ONLY, what happens to the Left Flow Control Valve, Right Flow Control Valve, and the pre-cooler crossover valve?

Left Flow Control Valve - OPENS
Right Flow Control Valve - CLOSES
Pre-Cooler Crossover Valve - CLOSES
TRIM AIR ONLY CAS message is displayed.