De-Ice 2013

Question 1

LOUT

Answer 1

Lowest Operational Use Temperature
Higher of:
The lowest temperature that provides protection for aerodynamic tests
The Actual Freezing Point of the fluid plus a 7 degree C buffer for Type IV or 10 degree buffer for Type I

Question 2

Pre Takeoff Check

Answer 2

Done within the HOT just prior to takeoff.

Question 3

Pre Takeoff Contamination Check

Answer 3

Done in operations in Heavy Snow or anytime the HOT has been exceeded. Must be completed within 5 minutes prior to Takeoff

Question 4

Icing Conditions may exist below 10 degrees C

Answer 4

Moisture on the wing
Wing fuel is 0 degrees C and less
Dew Point Spread less than 3 degrees

Question 5

Cold Weather Inspection must be completed… ?

Answer 5

When the outside air temp is 5 degrees C or less.
Wing fuel bulk temp is 0 degrees C or less.
Remained overnight with exposure to conditions
Cold Soak Ice is suspected
Accumulated Ice on the inbound flight

Question 6

Cold Soaked Fuel is in contact with the wing when the fuel quantity is above… ?

Answer 6

2297.2 lbs.

2300 lbs

Question 7

Frost on the underside of the wing acceptable within what limits

Answer 7

Maximum of 1/8th inch.

Question 8

Fluid Freeze buffer if Type I is the only deice fluid used

Answer 8

Buffer of 10 degrees C

Question 9

Is the Pre Takeoff Contamination Check authorized for the CRJ 200

Answer 9

No… only the CRJ 700 / 900

Question 10

Pre Takeoff Contamination Check required when…

Answer 10

HOT has been exceeded
HOT is no longer valid due to changing conditions
Operations in Heavy Snow Conducted

Question 11

Is the upper surface of the fuselage on the CRJ 200 considered a critical surface?

Answer 11

Yes… but thin frost is authorized as long as able to distinguish surface features underneath.

Question 12

Is the upper surface of the CRJ 700/900 a critical surface?

Answer 12

No… but same limitation as with the CRJ 200

If not, it must be deiced with Type I with no HOT

Question 13

Can the HOT be extended by a pre takeoff contamination check if operating in Ice Pellets?

Answer 13

NO

Question 14

If Ice Pellet Precipitation stops, takeoff is authorized up to

Answer 14

90 minutes as long as temperature remains constant or increases.
If Temperature decreases, takeoff is not authorized.

Question 15

Is takeoff authorized in Heavy Ice Pellet Precipitation

Answer 15

NO… Moderate and below is the limitation in Ice Pellets.

Question 16

If Rotation is less than - XX - Kts… what is the limitation

Answer 16

If less than 115 KTS, operation is not authorized using Propylene Glycol (PG) fluids or if the fluid type is unknown.

Question 17

In conditions of light snow mixed with light snow grains… use what HOT

Answer 17

Use light freezing rain HOT

Question 18

What is the color of Type I Fluid

Answer 18

orange to off orange

Question 19

What is the color of Type IV Fluid

Answer 19

Green

Question 20

What is the color of Type II or III Fluid

Answer 20

Pale Straw