B777 - Cold Weather

Question 1

Contaminated Runways

Answer 1

Assume Temp Derate NOT PERMITTED

Question 2

TakeOff On Contaminated Runway NOT ALLOWED when

Answer 2

1/2” slush/wet snow/water

4” dry snow .

Question 3

Icing Conditions

Answer 3

Ground OAT or TAT<=10C
In vis moisture or <1600m
Or standing water present

Question 4

Engine TAI

Answer 4

On after both started

Question 5

Taxiing

Answer 5

Flaps UP

Engine Runup <= 3C

Question 6

Engine Runup

Answer 6

50% N1 for 1 sec
Per hour
If done at TO vib < 4

Question 7

Fan Ice Removal
In-Flight
(<70% + vib)
One at a time

Answer 7

Near Idle then 70%
for 10-30sec
Repeat 15 mins

Question 8

Exterior Inspection

TO permitted

Answer 8

3mm lower surface fuel frost. But LE, controls, upper wing clear of snow, ice, frost

Question 9

Exterior Inspection

TO permitted

Answer 9

With hoar frost. Can see paint.

But inlets, vents, gear doors free of snow/ice.

Question 10

Cold Temperature Altimeter Correction

FCOM SP.16.10

Answer 10

• Round up nearest 100;
• not for ATC radar vect;
• FL’s;
• 0 deg or abv mnm temp.

Question 11

Wet Runway

Answer 11

Shiny

Question 12

Contaminated Runway

Answer 12

> 25% >3mm or slush or snow, ice

Question 13

Damp

Answer 13

Not shiny.

Question 14

If precip on Aircraft then frost can form

Answer 14

-2 - + 15 C

Question 15

Fluid Types

B777 Approved

Answer 15

I, II, IV

Question 16

Type I

Answer 16

Single step or first of two step

Question 17

Type I

Answer 17

Freeze point at least 10C below ambient

Question 18

Type II,IV

Answer 18

Thicker. May leave residue. Longer holdover. Clean with hot type I

Question 19

Holdover

Answer 19

Consult Quick Reference on Extranet VAI-FO-032

Question 20

Holdover

Answer 20

Where pre-takeoff visual inspection: do within 5min of TO

Question 21

Holdover

Answer 21

Starts as recorded on M/L

ie Start of Type I or start of 2nd if type II, IV