Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

UAE A380 Operational Flashcards (BA7) > Ch.10 Deicing/Anti-Icing Guide > Flashcards

Ch.10 Deicing/Anti-Icing Guide Flashcards

1
Q

What references should crew refer to when conducting De/Anti Icing?

UAE OM-C 10.3

A

OM-A Ch. 3 and 8. GOM, FCOM/FCTM and OMC Ch 10.3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the basic steps and intermediary checks between each step of De/Anti-Icing?

UAE OM-C 10.3.1.1

A
  1. Start of Anti-Icing
  2. Pre-Takeoff Check (PTC)
  3. Min HOT Expiry
  4. Pre-Take Off Contamination Inspection (PCI) within 5 min of T/O
  5. Max HOT Expiry
  6. Perform External PCI or repeat treatment
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

With what form of precipitation shall table 50 “Snowfall intensities as function of prevailing visibility” be used?

UAE OM-C 10.3.1.2

A

SN, SG, GS only or accompanied by FZFG, BLSN, DRSN and/or IC.

Visibility can be METAR/SPECI or crew observed Visibility.

SN: Snow, SG: Snow Grains, GS: Snow Pellets (small hail), IC: Ice Crystals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

If METAR reports -SN but when using the below table you deduce it’s moderate given the conditions and time of day of the same METAR, which do you follow?

UAE OM-C 10.3.1.2

A

Treat is as moderate (most restrictive)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Can RVR be as a visibility source for the table below?

UAE OM-C 10.3.1.2

A

No. Only METAR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When both tower and surface visibility are reported, which is preferrable to use in conjunction with below table?

UAE OM-C 10.3.1.2

A

Surface Vis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

When is takeoff not permitted in the realm of adverse CWO precipitation?

UAE OM-C 10.3.1.3

A
  • MOD or HVY FZRA
  • +SN (exc. 10.3.14)
  • GR, GS, SG, PL (exc.10.3.13)

PL: Ice pellets, GS: Small hail or Snow pellets.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What can crew utilize to determine snowfall intensity when accompanied by another form of obscuration?
(e.g. light snow reported but reported smoke brought visibility down to 600m which on the table is considered heavy)

Can all obscurations be considered using the methodology in your answer?

UAE OM-C 10.3.1.2

A

Generally crew must utilize the table to assess the snowfall intensity as it takes precedence over the reported METAR intensity; but, in cases as presented in the question and after careful assessment the crew can use the METAR/SPECI snowfall intensity.

See exceptions below

This method **SHALL NOT ** be used for SN accompanied by:
1. DRSN or BLSN
2. FZFG
3. IC (Ice Crystals)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the only form of contamination that does not need treatment?

UAE OM-C 10.3.2
UAE FCOM BA7 PRO/NOR/SUP/SUP-ADVWXR

A

Max 3mm of hoar frost on lower side of wing tank area or upper surface of the fuselage.

Thin enough to descern markings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When is it not preferable to use the one step de-icing/anti-icing process?

UAE OM-C 10.3.3.3

A

When there exists a thick later of contaminant on the the aircraft critical parts as it uses up much more fluid.

One step is the usual option at areas that

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Is holdover time affected if de/anti-icing is performed as a one or two step treatment?

UAE OM-C 10.3.3.1

A

No, the only difference is that HOT begins at the start of the final step application

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What positives does the two step treatment have over the one step treatment?

UAE OM-C 10.3.3.4

A

The two step procedure leaves less residue, uses less fluid and is thus more economical and green.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When can localized de-icing be utilized and it’s main considerations?
And under what conditions is it prohibited?

UAE OM-C 10.3.3.5

A

It can be used when only a localized area is affected (e.g. over mid tanks) as long as it’s applied symmetrically.

This can be used to save time and costs but shall not be carried out during active frost or active/expected precipitation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a particular consideration and threat when using FADS technique in spraying over de/anti icing fluid?

Forced Air De-Icing System

UAE OM-C 10.3.3.6

A
  • It may reduce HOT when anti-icing with type 2-4 fluids due to aeration.
  • Threat of entering senstive probes and areas

HOT not affected if used for de-icing only
Aeriation is indicated when the fluid becomes frothy and milky in appearance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

In what configuration shall crew de/anti-ice in if the wing was contaminated with the flaps and slats retracted?

UAE OM-C 10.3.3.8

A

A/C shall be de-iced with the flaps retracted before configuring.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the main reason aircraft configuration is delayed till before takeoff?

UAE OM-C 10.3.3.8.2

A

Flap extention causes earlier fluid failure via increases flow off thus negatively impacting HOT

This card was added since some MEL operational procedures (e.g. PRIM 1 inop) will require crew to configure before taxi.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What dynamic factors will the crew take into account when deciding if the HOT is still valid? And what shall the crew do in case they have any doubt?

UAE OM-C 10.3.5

A
  1. Precipitation type and rate after treatment
  2. Time elapsed since treatment
  3. Jet blast from preceding A/C
  4. Blowing snow

Crew shall perform a PCI in doubt arises about HOT validity

18
Q

When is a PCI required?

UAE OM-C 10.3.6

A
  1. Min HOT expires, and precipitation has occured after complete treatment.
  2. Any doubt
  3. CC or PAX report suggested fluid failure
  4. +SN encountered after complete treatment

Must be completed within 5 minutes of take-off

19
Q

What shall crew do if max HOT expires?

UAE OM-C 10.3.6

A
  • External PCI to be conucted, or,
  • return for another treatment
20
Q

From where can a PCI be conducted and what is the representative surface defined in the PCI?

UAE OM-C 10.3.6

A

PCI can be performed either internally or externally against the area from the wing root until the first engine pylon and spanning the entire chord of the both representative areas.

both sides must be checked

21
Q

When is an internal PCI not allowed?

UAE OM-C 10.3.6.1

A
  • Max HOT expiry
  • Ice pellets or small hail precipitation (GS)
  • Representative surface cannot be seen from inside
22
Q

If the commander elects to conduct the PCI internally, who are the crew responsible?

UAE OM-C 10.3.6.1

A

The commander shall conduct the internal PCI or delegate it his FO or augmenting crew.

23
Q

Who conducts the external PCI?

UAE OM-C 10.3.6.2

A

Approved de/anti-icing provider.

24
Q

What are indications of fluid failure?

UAE OM-C 10.3.6.4

A
  • Snow does not melt on the fluid
  • Change in appearance (glossy to opaque)
  • Precipitaion accumulation on the fluid
25
Q

What if a PCI is inconclusive (cannot properly identify the state of the fluid)?

UAE OM-C 10.3.6.4

A

PCI considered failed

26
Q

Can HOT time be paused for intermittent precipitation?

UAE OM-C 10.3.7

A

No

27
Q

What are the guidlines on “pilot assessments of precipitation intensity procedures”?

UAE OM-C 10.3.7.1.1

A
  1. Pilot Discretion: As in if the pilot sees a gross under or over representation of the live weather conditions in METAR/ATIS/ATC reports.
  2. Reporting New Observation: Before acting on own observation (above case) pilots will request a new observation and if that is not possible or if it is still grossly inaccurate only then will the pilots be able to act upon their own observation.
28
Q

What temperature should be used to calculate HOT time?

UAE OM-C 10.3.7.2

A

OAT or Wing skin temperature (which ever is lower)

Wing skin temperature is Fuel tank after refueling

29
Q

What should crew consider of wing skin temperature is too restrictive for the HOT?

UAE OM-C 10.3.7.2

A
  • Load extra discretionary fuel
  • Wait for wing skin temperature to warm up
  • Use HOT based on the warmer OAT and perform a PCI
30
Q

How to deal with “Dry Snow”?

UAE OM-C 10.3.8.2

A

Wind can carry it and it can cause it not to stick to the A/C. Applying fluid can make the dry snow stick.

31
Q

What are the hazards with “Active Frost”?

UAE OM-C 10.3.8.3

A

Occurs when skin temperature is below 0ºC (cold soaked fuel).

32
Q

What are the hazards with “FZFG”?

UAE OM-C 10.3.8.4

A

Likely to cause engine fan ice and treatment is mandatory. There is a** special table **also for HOT of snow mixed with FZFG.

33
Q

How to treat freezing mist?

UAE OM-C 10.3.8.5

A

Dealt in the same HOT as FZFG if reported alone. If reported with other precipitation then it is considered as a mere obscuration

34
Q

How to treat -FZRA and FZDZ?

UAE OM-C 10.3.8.6

A

They freeze upon impact.** No HOT exists for FZRA or +FZRA**

FZDZ is < 0.5mm and FZRA is >0.5mm

35
Q

Hazard of Rain on cold soaked wings?

UAE OM-C 10.3.8.6

A

It may cause an insidious layer of ice over upt to OAT of 15ºC the wings and a tactile check must be done post treatment by the treatment ptovider

36
Q

What precipitations have special HOT tables?

UAE OM-C 10.3.8.9

A
  • FZFG with SN
  • Ice Pellet and Small Hail
37
Q

Hazards of Ice Pellets / Small Hail? GS PL

UAE OM-C 10.3.8.9

A
  • They remain in the frozen state in anti-icing fluid and not absorbed or dissolved.
    *PCI cannot extend the HOT of thos conditions
  • Undiluted Type IV must be used in a two step procedure and ise **special HOT table **
  • In no intensity is reported use moderate in HOT
  • If PL/GS stopped before HOT expires then HOT extends to 90 minutes after the start of the application
38
Q

Are fluid colours universal?

UAE OM-C 10.3.9.2

A

No. Some destinations appear to use non standard colours i.e. Japan, Chine and Russia.

39
Q

How to deal with Type I?

A

Type I us mainly for De-icing and can be used for Anti-icing (20 min).
Crew shall not request a specific dilution as Type I has specific dilution and MUST be heated.
Affected by the surface material (metal retains better)

Type II and IV do not get affected by surface material

40
Q

What is LOUT?

UAE OM-C 10.3.9.7

A

Lowest Use Temp. Fluid must not be used below a OAT or Skin temperature on LOUT

UAE A380 Operational Flashcards (BA7) (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions