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KA350 Conversion Course > KA350 Aircon / Pressurisation > Flashcards

KA350 Aircon / Pressurisation Flashcards

1
Q

What components are supplied by the Pneumatic system?

A 
Pneumatic - 
Hour Meter
De-Ice boots - Inflation
Hydraulic reservoir
Cabin door seal
Bleed air warning
Window defog & pressure guage
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2
Q

What components are supplied by the Vacuum system?

A

De-ice boots - Deflation

Pressurisation controller

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3
Q

Where does the negative pressure for the vacuum system originate?

A

Bleed air exhausted overboard through a venturi provides suction (-ve pressure)

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4
Q

Explain how the bleed air warning system provides warning to the Pilot that there is a leak and what annunciators illuminate?

A

Each bleed air line has a parallel plastic tube that will melt when exposed to a bleed air leak above 200F triggering a pressure switch. If pressure drops below 2 PSI then a [L / R BLEED FAIL] warning comes on.

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5
Q

What are the BOLDFACE actions for a [L / R BLEED FAIL] warning?

A

BLEED AIR VALVE (affected eng)___PNEU & ENVIR OFF
[L BL AIR OFF] or [R BL AIR OFF]___ILLUMINATED
CABIN VSI and PNE PRESSURE___MONITOR
BRAKE DE-ICE(if installed)___OFF

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6
Q

WIll the [L / R BLEED AIR] Annunciator extinguish after the bold face is completed?

A

NO

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7
Q

What is the normal operating pressure range of the Pneumatic system?

A

12-20 PSI

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8
Q

What is the normal vacuum range of the Vacuum system ABOVE 15000ft?

A
  1. 3”-5.9” (BELOW 15K)

2. 8”-4.3” (ABOVE 15K)

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9
Q

Name the actions involved in the Bleed Air Valve Check. Include expected gauge and annunciator indications

A

L BL AIR SWITCH___PNEU & ENVIR OFF
Pressure/sucion in limits, no warnings
R BL AIR SWITCH___PNEU & ENVIR OFF
Pressure/suction to 0, [L / R BLEED AIR FAIL]
L BL AIR SWITCH___OPEN
Pressure/suction in limits, warnings extinguish
R BL AIR SWITCH___OPEN

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10
Q

What position would the bleed air switches need to be in for only the pneumatic system to operate?

A

ENVIR OFF

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11
Q

What 3 switches in the system will prevent the Air Conditioning compressor from operating?

A

Under Pressure, Over Pressure & RH Engine speed switch (N1 < 62%)

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12
Q

What are the functions of the safety valve?

A

Pressure Dumps air in the event of outflow valve failure (limits cabin alt to 13500ft)
Positive pressure relief
Negative pressure relief

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13
Q

What is the maximum neative differential pressure for the KA350?

A

0.0 PSID

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14
Q

What is the maximum positive differential pressure for the KA350?

A

6.6 PSID

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15
Q

What altitude is set on the presurisation controller prior to takeoff?

A

Cruise Altitude plus 1000ft OR Arrival airfield elevation plus 500ft, whichever is greater

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16
Q

What position should the rate knob be set to prior to takeoff and prior to descent?

A

11 - 1 o’clock position

17
Q

To what altitude is the pressure controller set prior to descent?

A

500ft above Airfield pressure altitude

18
Q

What are we looking for in the After Takeoff checks for the pressurisation checks?

A

Cabin Climb is lagging VSI climb, Cabin Alt is laggin cabin diff needle.

19
Q

If the ambient temperature is greater than 10°C what position must the environmental bleed air switch be in for takeoff?

A

LOW (to increase power in hot temps)

20
Q

What is the advantage of placing the environmental bleed air switch o Normal?

A

Increased heating or efficient pressurisation flow

21
Q

When would the window de-fog be of assistance?

A

Descending from cold environment into warm mositure laden air

22
Q

Name the actions required to perform the pressurisation check.

A 
ENVIRONENTAL BLEED AIR\_\_\_NORMAL
BLEED AIR VALVES\_\_\_OPEN
PRESSURISATION CONTROLLER\_\_\_SET
CABIN PRESSURE SWITCH\_\_\_HOLD TEST
CABIN ALT & VSI\_\_\_CHECK FOR DESCENT
CABIN PRESSURE SWITCH\_\_\_RELEASE
PRESSURISATION CONTROLLER\_\_\_SET
23
Q

When the CABIN TEMP MODE selector is in the MAN COOL position, how is the cabin temperature lowered?

A

Hold the MAN TEMP INCR-DECR switch to Decrease for 1 min to fully close the Left bypass valve.

24
Q

At what altitude will the CABIN ALT HI annunciator illuminate?

A

12000ft

25
Q

At FL260 if the cabin press switch was moved to DUMP what would the cabin altitude rise to?

A

13500ft

26
Q

What source of air is used to pressurise the aircraft?

A

P3 Bleed Air from the Third Stage compressor.

27
Q

To achieve maximum cooling on the ground what switch selections need to be made?

A

CABIN TEMP MODE___AUTO
VENT BLOWER___HI
BLEED AIR VALVES___ENVIR OFF
AFT BLOWER___ON

28
Q

Under what conditions can the ELECTRIC HEAT be operated?

A

Only with a generator online or external power connected and on the ground with the RH squat switch engaged.

29
Q

How does air enter the cabin if the cabin pressure switch is in the DUMP position?

A

RAM air

30
Q

How do you clear the cabin of Smoke and Fumes?

A

Dump cabin pressure and open the storm window below 13500ft

KA350 Conversion Course (5 decks)

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