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DO228 type rating > section 7- ice protection > Flashcards

section 7- ice protection Flashcards

1
Q

how does the engine inlet anti ice prevent ice formation?

A

bleed air

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2
Q

the do we switch on engine anti icing?

A

when flying or on the ground in an atmosphere containing precipitation or visible moisture below 5C

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3
Q

what powers the engine inlet anti-ice?

A

28v DC

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4
Q

what protects the engine inlet anti-ice?

A

DE-ICE INLET LH/BUS 1 on the overhead panel

DE-ICE INLET RH/BUS2 on the AC/DC breaker panel

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5
Q

what controls the engine inlet anti-ice?

A

2 INLET toggle switches on the LH overhead switch panel

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6
Q

how are the wing and empannage de-icer boots operated?

A

engine bleed air operated

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7
Q

how many parts are the wing anti-ice boots divided into?

A

3

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8
Q

where are the de-icer boots?

A

leading edge of wings, vertical stabiliser and horizontal stabiliser

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9
Q

what is the reason for heating the de-icer boot ejector valves?

A

prevents overnight freezing of the valves

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10
Q

what powers the de icing boots?

A

28v DC

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11
Q

what protects the de-icer boots?

A
  • SURF ICE/ESS BUS on the overhead breaker panel

- DE-ICE PROP LH/BUS 1 on the overhead breaker panel

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12
Q

what happens if the de-icer boots toggle switch is in the OFF position?

A

vacuum is applied to the boots to hold them against the leading edges

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13
Q

what happens if the de-icer boots toggle switch is in the ON position?

A

one single automatic cycle is activated

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14
Q

what happens when the de-ice boots are activated?

A

6-second inflation of the inner wing followed by 6 second inflation of the empennage boot and 6 seconds of outer wing boot inflation.

this illuminates the blue SURF DEICE light on the co-pilots side for 20 secs

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15
Q

how to the deice boots expand and contract?

A

pressure and vacuum using engine bleed air

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16
Q

what does ice need to accumulate to in order to be broken by the change in contour when the boots are inflated?

A

1.5cm

ice formation aft of this area will be removed by dynamic air pressure

17
Q

what is each propellor blade provided with for de-icing?

A

de-icing mat with an outboard and inboard heating element

18
Q

how is power for the propellor de-ice controlled?

A

a timer, through brushes and a slipring

19
Q

when does the timer control prop de-icing?

A

when the PROP switch is ON

20
Q

what does the prop de-ice timer provide?

A

2 heating cycles (inboard/outboard element), which will start where the previous cycle left off

21
Q

when must the prop de-icing be switched on?

A

before entering icing conditions

22
Q

what is the purpose of the ice protection plates?

A

to protect the fuselage from ice debris from the prop

23
Q

what protects the prop DE-ICE system?

A

DE-ICE PROP LH/BUS 1 on the overhead breaker panel

DE-ICE PROP RH/BUS 2 on the AC/DC breaker panel

24
Q

how is correct operation of the prop de-ice indicated?

A

a respective reading on the 2 ammeters located on the pedestal panel

25
Q

what can too much operation of the windshield anti-ice on the ground cause?

A

distortion and bubbling in the windshield

26
Q

what is the normal operating temperature of the windshields?

A

45C- generated by 1 or 2 static inverters

27
Q

what powers the windshield anti-icing?

A

28v DC

28
Q

what protects the windshield anti ice?

A
  • W-SHIELD/HEAT BUS 2 on the AC/DC breaker panel
29
Q

what protects the windshield anti-ice with2 static inverters?

A
  • W-SHIELD HEAT-LH/BUS2 on the AC/DC breaker panel

- W-SHIELD HEAT-RH/NON-ESS-BUS on the AC/DC breaker panel

30
Q

how is the windshield anti-icing system with 1 static inverter controlled?

A

W-SHIELD 3position toggle switch on LH overhead panel

31
Q

how is an overheat in the windshield anti-ice signalled?

A

WINDSH OVERH caution light

DO228 type rating (22 decks)

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