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AT354 > Quiz 5 APU/Fire Protection > Flashcards

Quiz 5 APU/Fire Protection Flashcards

1
Q

what does the APU provide

A

DC electrical power
environmental bleed air
both in-ground and in flight

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2
Q

Was the Hawker made with the APU

A

no it was added later via a supplemental-type certificate
(found in the supplement section of the AFM

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3
Q

The APU starter/generator power the aircraft electrical system via

A

PS2

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4
Q

Where does the APU get its fuel from

A

The left tank through the APU fuel shutoff valve

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5
Q

What does the stop button on the APU panel do

A

initiates shut-down of the APU - this button is used to shut down the APU during all normal operation

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6
Q

when will the automatic ECU shutdown of the APU occur in flight or on the ground

A

APU fire
low oil temperature
high oil pressure
DC power interruption of the ECU
Overcurrent to the ECU
loss of EGT signal
High EGT - above red line
overspeed - in excess fo 110%
loss of speed signal

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7
Q

Do we monitor the APU? Why?

A

no - it is self-monitoring to reduce pilot workload

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8
Q

Starter Generator when run by APU

A

as generator it powers the PS2 and PE - will power PS1 if bus tie is closed

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9
Q

APU emergency shutoff is located in the

A

rear equipment bay

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10
Q

(limitation) maximum rpm for APU

A

110%

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11
Q

(limitation) Maximum EGT for APU

A

1350F

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12
Q

(limitation) maximum transient EGT

A

14000F to 15000F for 15 seconds

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13
Q

(limitation) what pressure altitude can you not run the APU after

A

30,000

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14
Q

(limitation) what pressure altitude can you not start the APU after

A

20,000

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15
Q

(limitation) when will you shut down the APU if the ready to load light is not illuminated

A

within 60 seconds

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16
Q

(limitation) starter limits for APU

A

1st and 2nd attempt - 30 second on, 3 minutes off
3rd attempt - 30 seconds on 30 minutes off

17
Q

(limitation) when should you not attempt a restart

A

both main generators have failed

18
Q

(limitation) When is APU start prohibited

A

the left engine has been shut down due to fire or engine failure
automatic shut down has occured

19
Q

(limitation) max generator load

A

.8

20
Q

(limitation) maximum transient generator load

A

1.2 for less than 10 seconds

21
Q

(limitation) limit for simultaneous operation of the APU and engine bleed are

A

1 minute

22
Q

(limitation) can the APU be on for icing or anti-icing conditions

A

NO

23
Q

(limitation) if passengers are on board the aircraft and the APU is on what must also be done

A

A crew member must be on the aircraft

24
Q

(limitation) what are the rules for refueling and APU

A

can not be started during a refueling operation
if on during refueling must be refueled by single-point pressure refueling

25
Q

what are the limitations to bleed air

A

123
1 minute with the main air valves and APU bleed operations running simultaneously
2 minutes run with no load before placing bleed air load on the APU
3 minutes in between start attempts

26
Q

how many indications do we get when there is a fire

A

6 or 7

27
Q

when would we get 7 fire indications instead of 6

A

if engine instruments are on the copilot’s PFD instead of PIC. If it is on PIC it will be 6 indications

28
Q

What is a fire (or overheat) detected by

A

fire/overheat responders connected to continuous wire sensor
the sensor wire is filled with gas that expands when heated

29
Q

What are the indications of an engine fire

A

ENG1/2 FIRE look up annunciators
ENG FIRE annunciator on the fire panel
master warning lights
HP Cock warning light
warning bell

30
Q

What is our fire extinguisher and where are they located

A

two dual-head, single shot bottles located aft equipment bay

31
Q

what is each fire extinguisher capable of

A

it is capable of discharging its total contents into zone one of either engine
both bottles can be discharged into either engine or both in the same engine

32
Q

What is shot 1 (fire extinguisher 1)circuit powered by

A

PE

33
Q

What si Shot 2 (fire extinguisher 2) circuit powered by

A

PS2

34
Q

What are the fire warning circuits powered by

A

PE

35
Q

the 2 sensing elements, 2 responders, 2 zones

A

these tell us something is HOT not that there is a FIRE

36
Q

where are the pressure relief indicators located

A

under left pylon

37
Q

when will the APU bottle automatically discharge

A

5 seconds after APU auto-shutdown due to overheat

AT354 (9 decks)

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