Ice Protection

Question 1

What is bleed air used to heat?

Answer 1

Leading edge of Wing
Leading edge of Eng Inlet
Leading edge of Stabiliser

Question 2

Name the 3 modes of the de ice system

Answer 2

Auto
Eng
All

Question 3

What position must the windscreen wipers be in for take off?

Answer 3

Parked

Question 4

Max speed for windshield wiper operation?

Answer 4

170kt

Question 5

What is the windscreen heated by?

Answer 5

Electrics

Question 6

Are the windscreens automatically heated?

Answer 6

No

Question 7

Explain the 3 types of anti ice modes; ALL, ENG, AUTO

Answer 7

ALL - Wing / Stabiliser anti ice valve is closed below 25kt to prevent structural damage.. speed is 0
Auto - elec pitot/static heat applied w/ at least one engine running
ENG - commands anti ice system open for eng anti ice at all times

Question 8

What is the timing of the windscreen wipers?

Answer 8

2 strokes every 8 sec

Question 9

How do we know that the AI is operating?

Answer 9

4 x “open” inscriptions on OH panel

Question 10

Below what speed is wing and stabilator anti-ice inhibited?

Answer 10

25kts

Question 11

Min and Max temp for anti ice operations

Answer 11

-40 to +10 degrees

Question 12

Why do we not select windscreen anti ice on the ground / take off?

Answer 12

Windscreen weakens when heat applied on the embraer…

Question 13

How is Piccolo tube integrity monitored?

Answer 13

Horizontal stabilizer: By one differential pressure switch comparing the ​left and right Piccolo tubes pressure. ​Half-wing: It depends on the airplane model. By one differential ​pressure switch in each Piccolo tube comparing the root and tip ​pressures or, by manometric switches measuring the tip pressure ​only.

Question 14

What are the 2 windshield heat modes on the aircraft? What temp is an overheat warning triggered?

Answer 14

Defog - if temp below 26 degrees, this temp is maintained.
Anti ice - if icing conditions are detected, windows are heated to 43 degrees
O/heat 65 degrees

Question 15

When should window heat be turned on?

Answer 15

In the descent and when icing conditions exist.

Question 16

When are TAT probes 1 and 2 heated?

Answer 16

When engine AI is on OR in flight OR when Thrust levers are in THRUST SET detent,

Question 17

When are PS3 and pressurisation Static 2 heated?

Answer 17

Any flight condition.

Question 18

When are pitot 1 and 2, ps3, AoA 1 and 2, and static 1 and 2 heated?

Answer 18

With one engine running and N2 above 56.4%

Question 19

When is lavatory heating turned on?

Answer 19

Whenever DC bus 1 is powered

Question 20

Min ice detected before system operates? How long does the system remain active?

Answer 20

0.5mm, 60 seconds

Question 21

What are the various windshield wiper modes and what does each deliver?

Answer 21

TIMER -​ 2 strokes)​ with an 8 ​second time interval​ between two cycles. ​
OFF​ -​ inboard ​position, parking out of​ pilots​ vision. ​
LOW​ -​ 80 ±​ 10 strokes per​ minute. ​
HIGH -​ 140 ±​ 14 strokes​ per minute.

Question 22

During the anti ice test prior to departure, what 4 items are you looking for?

Answer 22

4 WHITES OPEN
ICE CONDITION
ICE DET 1(2) FAIL
BLEED 1 (2) LOW TEMP