Winter Ops

Question 1

How do we evaluate the % Surface contamination in :

Canada - RSC
USA - FICON
Others - SNOWTAM

Answer 1

Canada - Sum of all the contam

US - Sum of each third and /3

SNOWTAM - % or 3rds if 3rds use US technique

Question 2

What contam is not considered contam

Answer 2

Wet

Trace

Frost

snow 1/8” or 3mm

Question 3

If the Sum of the contam is not >25% what should you do

Answer 3

use WET #’s

Question 4

Can we take off in WET ICE

(WET ICE, Water over ICE, Water over Compact Snow, Slush over ICE, DRY or WET Snow over ICE

Answer 4

Takeoff Prohibited

Question 5

If all contam is < 26% what should be used for calculations

Eg FICON 10%+25%+20% = 55%

Answer 5

use the second most restrictive

Question 6

What do you use if the runway is divided in 1/3

Answer 6

use the 1/3 with the most restrictive contam

Question 7

Can we land with WET ICE

Answer 7

yes if <25%

Question 8

What is mandatory if taking off in rain with a cold soaked wing?

Answer 8

Must spray with type II III IV

Question 9

How much frost is permitted on the underside of the wing between the forward and aft spars.

Answer 9

1/8

Question 10

Is the upper fuselage considered a critical surface?

What is permitted?

Answer 10

No it’s not

Only a thin layer of frost permitted

Question 11

How warm can cold soaking occur up to?

Answer 11

14 deg

Question 12

How do you determine if active frost conditions exist?

Answer 12

Use the “dew point and frost point” tables

Question 13

How do you request a hotdr?

Answer 13

Transactions
Other
Hot/yyz

Question 14

When deciding when do we use the QRH DEICE checklist?

Answer 14

Door open - no

Door closed - yes

Question 15

What conditions cause barrel icing?

Answer 15

-5 to -12 deg

Mod to heavy snow

Question 16

Can you deice with engines off outside of North America?

Answer 16

No

Question 17

What is a PCI?

PDI?

Answer 17

Pretakeoff contamination inspection

Pre Departure inspection

Question 18

What is the order of precedence to get hot times?

Answer 18

Hotdr
AC eHOT app

Ac eHOT app used if ACARS is inop or HOTDS unserviceable

Question 19

When any HOT time is received what must be done if you want to go beyond the lower limit to the upper limit?

Answer 19

PCI

Question 20

Can a PCI extend an allowance time?

Answer 20

No

Question 21

How do we treat changing conditions with relation to hot times?

Answer 21

If improving use old HOTDR

If deteriorating requires new HOTDR

Question 22

What conditions for take off is prohibited if contaminants combined, cover more than 25% of the required length and 100 ft width of the runway to be used?

Answer 22

Take-off is prohibited if any of the following contaminants combined, cover more than 25% of the required length and 100 ft width of the runway to be used.

Wet Ice
Water over Ice
Water over Compacted Snow
Slush over Ice
Dry Snow or Wet Snow over Ice

Question 23

How do we treat a runway:
When it has a moisture layer that is NON reflective.

When it is covered with sufficient moisture to cause it to appear reflective.

Reported TRACE contamination

Reported FROST runway condition

Answer 23

When it has a moisture layer that is non reflective is considered to be damp, A damp runwayis considered to be WET

When covered with sufficient moisture to cause it to appear reflective, it is considered WET

Reported TRACE contamination shall be considered as equivalent to WET if the coverage is more than 25% of the area to be used.

Reported FROST runway condition shall be considered as equivalent to WET if the coverage is more than 25% of the area to be used.

(AOM 1 Limitations)

Question 24

What is the Maximum Amount of Snow, Slush or Standing Water for Take-off

Answer 24

Take-off is not permitted from any runway contaminated as defined above, if that runway is contaminated with:
>4 in (102 mm) of light dry snow,

> 2 in (51 mm) of packed dry snow,

> ½ in. (12.7 mm) of slush, wet snow or standing water.