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Knowledge Review > KR Deice/Anti-ice > Flashcards

KR Deice/Anti-ice Flashcards

1
Q

Where can information be found on deicing procedures?

A

Ground Deice Program Manual GDPM

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2
Q

Where can you find the GDPM?

A

Company Manuals

Weather Tab

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3
Q

How do you determine whether or not deicing/anti-icing procedures are required for each flight?

A

Perform cold weather preflight inspection

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4
Q

When is a cold weather preflight inspection required?

A

OAT <=5C OR
Wing fuel is 0C or colder OR
Atmospheric conditions conducive to icing (OAT <=10 and visible moisture) OR
Aircraft RON and subject to contamination
Through flight where residual ice from inbound leg may have accumulated OR
Cold soak ice is suspected in fuel tank area

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5
Q

How is the cold weather preflight inspection conducted?

A

Visual and tactile check of aircraft critical surfaces for frozen contaminants
Run hand along the leading edge and upper surface of wing to detect surface features
Surfaces are assumed contaminated when any surface features can no t be visually distinguished or felt

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6
Q

Is the pilot conducting the cold weather preflight inspection required to physical touch the wing?

A

Yes

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7
Q

How does the pilot pilot determine that the wing is contaminated or not?

A

Visually inspect the wing and run hand along the leading edge and upper surface

Surfaces are assumed contaminated when any surface features can no t be visually distinguished or felt

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8
Q

How is deicing accomplished?

A

One step process with Type 1 fluid

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9
Q

How is anti-icing accomplished?

A

Two Step process and we primarily use Type 4 fluid

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10
Q

You are operating UAX flight out of KSLC, which company conducts the deicing services and what is the procedure for deicing at the airport?

A

See Company Charts - Airport Info pages

“Deice for all Non-Delta connection operations conducted by IDS”

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11
Q

How is the aircraft configure for deicing?

A

Configured for takeoff

Engines Running or Engines OFF

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12
Q

When is the fuselage required to be decided?

A

A thin layer of frost on the fuselage is permitted but only to the extent that the airplane markings can still be see.

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13
Q

What are the four elements required to be transmitted to the PIC when being deiced?

A

A: Type of fluid used
B: Percentage of fluid within the fluid/water mix
C: Time of final deice/anti-ice step
E: Post deice and/or anti-ice check for clean surface is complete

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14
Q

What is Element A?

A

Type of fluid used

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15
Q

What types of deice/anti-ice fluid is Skywest authorized to use?

A

Type 1 - Approved
Type 2 - Approved, but are not used at Skywest at this time
Type 3 - Approved, primary as de-ice agent
Type 4 - Approved (100% concentrations used)

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16
Q

What is element B?

A

Percentage of fluid within fluid/water mixture

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17
Q

When is Element B communicated to the flight crew?

A

It may be communicated prior to the start of fluid application or at the end

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18
Q

What is Element C?

A

The time of beginning of final deicing / anti-icing step

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19
Q

What is Element D?

A

Not used by Skywest

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20
Q

What is Element E?

A

Specify the post deicing and/or anti-icing check for clean surface is complete

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21
Q

What is a holdover time?

A

HOT begins when final application of the deice/anti-ice fluid commences and expires when the fluid loses effectiveness.
HOT table are use for planning only and must be used in conjunction with pre-takeoff check
HOT related to amount of moisture it can absorb prior to freezing

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22
Q

What type of precipitation of established HOT?

A 
Active Frost
Snow/snow grains, pellets
FZDZ freezing drizzle
-FZRA light freezing rain
Rain on cold soaked wing
FZFG or IC freezing fog or ice crystals
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23
Q

Are you allowed to depart with any type of precipitation that is not on the HOT tables?

A

Yes
See freezing precipitation table in the GDPM
Ex. Light/Moderate Ice pellets (-PL/PL) and small hail

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24
Q

Can the pretakeoff check extend the allowance time

A

No, cannot takeoff outside of the allowance time

25
Q

Where is the snowfall intensity table found and when do I use it?

A

GDPM & HOT calculator

Used unless there is snow and and obscuration is reported

26
Q

How is precipitation intensity determined?

A

Official weather observations

27
Q

How is precipitation intensity determined when no official weather source states the precipitation intensity?

A

Use intensity of ice pellets
Intensity of rain and freezing rain
Intensity of freezing drizzle base on visibility
Snowfall intensities as a function of prevailing visibility tables

28
Q

Can operations be conduced when light and moderate ice pellets and light ice pellets mixed with other forms of precipitation are occurring?

A

Yes see allowance times charts found HOT PDF Viewer

29
Q

How is the start of the holdover time determined?

A

HOT begins when the final application of the deicing/anti-icing fluid commences

30
Q

When can a holdover time be adjusted?

A

Worse Changing conditions OR
If icing condition cease once a HOT has been established, HOT no longer applies, and if the critical surface are free of frozen contaminants, the aircraft may depart

31
Q

What is the HOT for Type I, light snow, -8C

A

5 to 8 minutes

32
Q

Establish a HOT for Type 4, safe wing MP IV launch, -SN, OAT -4C

A

1:08 to 1:50

33
Q

When does the HOT begin?

A

Final application of the deicing/anti-icing fluid commences

34
Q

What defines moderate ice pellets?

A

Table B-1

.11 inch to .30 inch per hour, more than .01 inch to .03 inch in 6 minutes

35
Q

If the visibility was 1/4 sm due to freezing drizzle, what intensity of FZDZ would that be?

A

See Intensity of freezing drizzle table

Heavy Vis <=1/4

36
Q

When is anti-icing fluid considered to have failed?

A

It appears dull, opaque and patchy

No longer be glossy

37
Q

What must occur if Type IV fluid has been determined to have failed?

A

Repeat the process again. Deice and then anti-ice

38
Q

How does a pilot determine if a fluid has failed

A

It appears dull, opaque, and patchy. It will no longer we glossy

39
Q

When is a pretakeoff check required?

A

Anytime aircraft has been deice/anti-iced and HOT is established
Performed as close to takeoff as possible within HOT

40
Q

How is the pretakeoff check accomplished?

A

Visually inspecting the representative surface

If its clean, you can takeoff

41
Q

Can a pretakeoff check be accomplished from the flight deck?

A

Any vantage point the PIC determines gives an accurate indication of the condition of the representative surface
The flight deck is normally used for the pretakeoff check
Flight deck or Cabin

42
Q

What is the valid time period for a pretakeoff check?

A

Within HOT

Just prior to takeoff

43
Q

Once deing/anti-icing has been accomplished, is it ever permissible to depart without conducting a pretakeoff check?

A

NO, a pretakeoff check must be performed as close to takeoff regardless of absence of active precipitation

44
Q

What is the procedure if the pilot cannot determine if the aircraft is clear of frozen contaminants after deicing?

A

The aircraft must be deiced and anti-iced again

45
Q

When is a pretakeoff contamination check required?

A

Must be performed when freezing or frozen precipitation has been present since completion of post deicing/anti-icing check when:
HOT exceeded
HOT no longer valid (changing weather conditions)
Ops in Heavy snow

46
Q

How is the pretakeoff contamination accomplished?

A

Check conducted inside cabin / Within 5 minutes of takeoff
Set Parking brake / Make PAX PA / Pilot out of flight deck protocol
Conduct close, visual inspection of both wings upper surface, flight controls, winglets for contamination and/or fluid failure
Turn off taxi lights, turn on wing inspection lights

47
Q

What a aircraft does the pre takeoff contamination check apply to?

A

CRJ700 & CRJ900

48
Q

How does the pilot determine if the fluid has failed when conducting the pretakeoff contamination check?

A

Frozen contamination accumulates on the surface of fluid
Fluid becomes opaque (loss of shine or gloss)
Frozen contamination is no longer absorbed by fluid

49
Q

Can the pretakeoff contamination check be accomplished from flight deck?

A

No

Inside cabin only

50
Q

What is the valid time period for a pretakeoff contamination check?

A

Takeoff must occur within 5 minutes of check

51
Q

Once deicing/anti-icing is accomplished is it ever permissible to depart with conducting a pretakeoff contamination check?

A

Yes

Depart within HOT and not operating in Heavy snow

52
Q

What is the clean wing concept?

A

Aircraft must not takeoff when frost, ice, snow is adhering to the wings, control surfaces, engine inlets, and other critical surfaces of the aircraft

53
Q

What are the critical surfaces on the CRJ?

A

Wing leading edge, forward and rear upper surfaces, flt controls, winglets
Horizontal Stabilizer leading edge, forward and rear upper surfaces, and flt controls
Vertical stabilizer and flight controls
Engine inlets

54
Q

What are the critical areas on the CRJ?

A 
Air data probes / AOA vanes
Antennas
Fuel drains and NACA vent scoops
APU intake/exhaust
Landing Gear
Flight deck windshields and windows
55
Q

During cold weather preflight inspection, the pilot determines there is a very light frost on the ailerons, what is the appropriate action?

A

Deicing must be accomplished

Anti-icing depending on conditions

56
Q

During the cold weather preflight inspection, the pilot determines there is ice accumulation on the winglets (vertical stab horizontal stab, landing gear area)?

A

Deice

Anti-ice if needed

57
Q

During preflight 1/8 of ice is observed on the underside of fuel tanks. What is appropriate action?

A

1/8 in of frost allowed

Ice may need to be remove

58
Q

Can an aircraft be deiced by an FBO or a company who does not normally deice our aircraft?

A

Yes

Station GM or PIC in absence of GM review procedures with contractor and oversee the deicing process

Knowledge Review (6 decks)

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