Cold weather operations

Question 1

For wet rwys can you use derate, ATM or both?

Answer 1

Derate, ATM or both is allowed

Question 2

For runways contaminated with Slush, snow, standing water, ice are you allowed to reduce thrust? Which method is allowed? Derate, ATM, both non of them?

Answer 2

Derate only.

Question 3

How much standing water can be on a rwy before takeoff is not recommended? (in mm)

Answer 3

13mm

Question 4

How much dry snow can be on a rwy before takeoff is not recommended? (in mm)

Answer 4

102mm

Question 5

When does icing conditions exsist?

Answer 5

• Below 10deg
• With visible moisture (fog, vis <1600m, rain, snow sleet)
• Ice, snow, slush, or standing water is present on ramp,taxiway or rwy

Question 6

What is the max thickeness of frost under wing due to cold water fuel allowe for takeoff?

Answer 6

3mm

Question 7

How long can the airplane be parked in temprature below -30deg celsius before MX need to do heating of the engine?

Answer 7

4hrs.

Question 8

When starting engines when shall NAI be turned on if there is icing conditions?

Answer 8

NAI shall be turned on after ALL engines have started.

Question 9

If there is snow or ice on the wings and you need deice anti ice? what changes in taxi procedure?

Answer 9

Delay flight control check until after deice/ antiice.

Question 10

When would you taxi with flaps up until approaching runway?

Answer 10

When taxing through ICE, SNOW, SLUSH, Standing water or precitpitation whent temperature below freezing.

Question 11

When do you need to do a run-up of engines to 60%N1 ?

Answer 11

Temp below 3 and NAI required.

Question 12

When deicing how long after deicing is complete until you can turn on pack selectors?

Answer 12

1min

Question 13

Which engine has the static run-up procedure of 60%N1 for 30sec prior starting the takeoff roll?

Answer 13

GE

Question 14

Which engine has the static run-up procedure of minimum 50%N1 for 1 sec and confirm stable engine operation prior starting the takeoff roll?

Answer 14

P&W

Question 15

When there is moderate to severe icing conditions what can you do if FAN icing is suspected due to engine vibrations?

Answer 15

Every 10 min, on one engine at the time, increase thrust to 70%N1 for 10-30sec.

Question 16

What is a good indicator if the need to put on WAI?

Answer 16

ice accumelation on flight deck window frames.

Question 17

When do you apply temperature correction?

Answer 17

temp reported below 0deg.

Question 18

What needs to be corrected of altitude/levels when temperature is below 0deg?

Answer 18

all minimum altitudes: dep, enroute, arrival, approach, missed approach, MDA, DA.

Question 19

When do you NOT need temp correction?

Answer 19

when on: Flight level(STD), ATC radar vectors, when temp is above 0 deg at airport.

Question 20

How much temp correction do you need for 1000ft height above refrence source at -10deg?

Answer 20

100ft.

Question 21

How much temp correction do you need for 500ft height above refrence source at -10deg?

Answer 21

50ft

Question 22

How much temp correction do you need for 4000ft height above refrence source at -10deg?

Answer 22

390ft rounded up to 400ft

Question 23

How do you calculate height above altitued refrence source?

Answer 23

Published minimum altitude on chart in feet minus airport elevation.
Example:
Minimum altitude 6000ft
airport elevation 1400ft
Hight above reference source 4400ft
temperature correction at -10deg= 440ft
You will select 6000+500=6500 on MCP and advice ATC you are applying temperature corrections.

Question 24

How will ATC know your applying?

Answer 24

You have to Advise ATC your applying temperature corrections.

Question 25

After landing what do you need to do if you have operated for a prolonged period in icing conditions?

Answer 25

Keep the flaps at 25 or 30 until flap area have been check to be free of contamination.

Question 26

When do you turn of NAI after landing if NAI is requried?

Answer 26

Just before before engines shutdown.

Question 27

Approach

Answer 27

Stay on FD or rate of descend until 50ft
40
IDLE
NOSE UP 
STRAIGHT
SPEEDBRAKE REVERSE