Icing Flashcards

1
Q

APU starting precaution OAT -15*C

A

Ground power should be used to start APU

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2
Q

Alignment time for IRS OAT -15*C

A

15minutes

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3
Q

Clean aircraft concept

A

All components of the plane that contributes to lift or aerodynamics must be cleared of snow/ice/frost

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4
Q

Upper fuselage limit of contamination

A

hoar frost

Thin crystalline that can be seen through underneath

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5
Q

Wing tank area frost limit

A

3mm

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6
Q

Before applying anti ice again

A

must first de ice with hot fluid mixture

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7
Q

Can deice begin with engines/APU running

A

yes or stopped. but mayn’t start engines/apu during application

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8
Q

Try to stay below what time during deice

A

20min for passenger comfort

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9
Q

-5*C OAT or below

A

snow or freezing rain may melt and refreeze on probes. have ground staff check before take off.

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10
Q

Time after anti ice before starting APU BLEED

A

5minutes

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11
Q

icing condition

A

OAT or TAT 10*C or below

visible moisture an form (Fog with 1 mile visibility or less)

surface of snow/standing water/slush/ice

SAT of 40*C or above even during descent

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12
Q

Airframe icing

A

shown by windshield wipers or ice indicator

WING ANTI ICE ON

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13
Q

Ice accretion on non heated structure

A

CLEAN: VLS +15kts

CONF all: VLS +5kts

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14
Q

Ice accretion non heated parts (WING ANTI ICE INOP)

A

VLS +10 or G DOT

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15
Q

Severe icing

A

5mm

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16
Q

take off not RECOMMENDED

A

icy runway

runway

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17
Q

Fan shedding

A

Below 1*C or less icing condition.

50% N1 for 10s every hour

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18
Q

Core ice shedding

A

freezing fog + idle more than 45minutes including taxi in from previous sector.

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19
Q

Down side of applying deice/antice fluid in cold dry snow

A

Cold dry snow may stick on fluid and wing must be clean before take off

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20
Q

Type of fluid not used

A

type 3

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21
Q

Repeated application for type 2 or 4 threat

A

may reside in aerodynamic quiet area. which may refreeze and interfere with aircraft systems and controls

22
Q

HOT values not covered for

A

HAIL

MODERATE AND HEAVY freezing rain

HEAVY snow

23
Q

Low HOT

High HOT

A

Moderate precipitation

Light precipitation

24
Q

Inspection when

A

entering the Low HOT 5min prior to take off from the cabin of upper wing surface

25
Q

Check

A

out of the HIGH HOT

26
Q

Type 4 special allowance

A

Mainly light to moderate ice pellets with different conditions

If weather conditions improve within the table time, take off permitted within 90 minutes after application of fluid

Certain condition with ice pellets must have OAT at or ABOVE during the 90minutes wait

27
Q

Take off/approach/landing prohibit

A

TO/APPR/LDG

Moderate freezing drizzle or rain(=+FZDZ/RA)

ANY HAIL (-GR/GR/+GR)

TO
HEAVY SMALL HAIL(+GS)

Moderate ICE pellets + other precipitation other than fog or mist(PL+XXX)

Heavy Pellets(+PL)

28
Q

Wing anti ice area

A

4 outboard slats

Test 30s on ground

29
Q

EAI

A

takes air from HP

30
Q

ICE NOT DET

A

130s no ice detected with EAI on

31
Q

TOD fuel check and procedure

A

12.9 disregard

Fuel only transfers when from outer to inner when inner tank is 3500-4000kg

Outer tank transfer closed 5 min after outer empty

Outer tank colder -15*C OUTER TK XFEE ON

When outer tank drained OUTER XFER OFF

32
Q

EO acceleration cold weather

A

Considered in RTOW below 15*C ISA

33
Q

Precaution of moving any flight control

A

Confirm free of ice before moving

34
Q

-15*C cockpit display

A

may not be available

35
Q

After landing SLAT/FLAP precaution

A

do not retract, after engine shut down have ground crew confirm clear of ice. then use electric pump to retract

36
Q

When to remove APU battery

A

-15*C and 12Hours on ground.

37
Q

Frost reduction on upper wing

A

Transfer outer tanks

  • FROST UPPER WING EXPECTED
  • Fuel remains in outer tanks after landing
  • refueling planned
38
Q

Active frost initial temperature

A

0*C

39
Q

Taxi precaution

A
  • 10kts
  • avoid large tiller inputs
  • dont set flaps or slats until at holding point to avoid slush or snow into controls.
  • fan ice shedding before take off
40
Q

Holding in icing condition

A

remain clean config

41
Q

Barometer and FPA

A

Actual altitude Lower than indicated

actual FPA lower than indicated

42
Q

Directional control

A

REV IDL
BRAKE release
Use rudder

43
Q

MSA correction

A

ISA -15*C around 10%

44
Q

0*C correction for

A

DA/IF/IAF/FAF/GA ALT/CIRCLE MIN/GS CHECK/

45
Q

When altitude corrections applied

A

can’t use FINAL APP

46
Q

LOUT for Type 1,2,4

A

type 1 10*C above freezing point

type 2,4 7*C above freezing point

47
Q

Snow fall intensity table reference

A

DAY/NIGHT/TEMP/VIS not RVR

48
Q

destination weather compared to alternate

A

Moderate freezing rain or drizzle then alternate must have nothing

49
Q

Fuel temperature

A

-44C below FL300
-54
C above FL300
MAX 55

50
Q

RCAM landing

A

PERF in QRH

51
Q

Crosswind in contaminated runways

A

LIM GENERAL

52
Q

Contaminated TAKE OFF info

A

QRH CP AWP