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AT 354 > APU and Fire > Flashcards

APU and Fire Flashcards

(61 cards)

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1
Q

what is the engine fire protection system composed of

A

two sensing elements, responders, roof panel indicators, warning bell, two engine extinguisher bottles, two test switches

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2
Q

what is the apu fire protection system composed of

A

four overheat indicators, warning light, warning bell, one fire extinguisher bottle

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3
Q

what is the “fire” detection actually sensing

A

overheat

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4
Q

what annunciator goes off when there is a “fire”

A

ENG1/2 FIRE
MWS Lights
warning bell

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5
Q

how can the fire bell be turned off

A

BELL CNCLD button

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6
Q

how many thermal switches are in the rear equipment bay – what is the protocol

A

6 – land asap!

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7
Q

what type of fire extinguisher is in the aft equipment bay

A

dual head, single shot
(right bottle to left engine)

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8
Q

What are shot 1 and 2 powered by

A

Shot 1: PE bus
Shot 2: PS 2

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9
Q

how many overheat detectors in the APU

A

4

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10
Q

what happens if the APU overheat detects something

A

fire bell and automatic shut down
APU bottle discharges automatically after shutdown

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11
Q

what is the APU

A

Garrett GTCP36-150W Auxiliary Power System

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12
Q

purpose of APU

A

provides DC power and environmental air bleed on ground and flight

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13
Q

what conditions will cause APU shutdown to occur

A

fire, low oil pressure, high oil temperature, loss of power to ECU, ECU overcurrent, loss of EGT signal, high EGT, overspeed, loss of speed signal

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14
Q

APU MAx RPM

A

110%

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15
Q

APU max EGT

A

1350F

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16
Q

APU max transient EGT

A

1400 to 1500 for 15 seconds

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17
Q

APU operation altitude

A

0 - 30,000 ft pressure altitude

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18
Q

APU starting altitude

A

0 - 20,000 pressure altitude

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19
Q

APU shutdown if READY to LOAD light not illuminated within

A

60 seconds

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20
Q

if both main generators fail can you attempt an in-flight start

A

no!

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21
Q

When is APU start prohibited

A

when left engine has been shut down for fire or engine failure
if automatic shutdown has occurred
max generator load .8
max transient load 1.2 for less than 10 seconds
refueling operations (but can operate just not start)

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22
Q

can you have the APU on in icing conditions (ground or air)

A

NOOOOOOOOO apparently

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23
Q

how was the APU added to the hawker

A

supplemental typer certificate

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24
Q

what does the APU provide

A

bleed air and DC electrical power

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25
what do you always monitor on the app panel
RPM, heat
26
how long "should" the apu run before loading it
2 minutes
27
APU On annunciator
the apu switch is in the "on" position
28
what is the preferred way to shut down the APU
stop button then off switch allows monitoring for engine shut down
29
automatic ECU shutdown of apu will occur in flight or on ground if any:
apu fire low oil pressure high oil temperature DC power interruption to ECU overcurrent to ECU Loss of EGT signal high EGT above red line overspeed in excess of 110% loss of speed signal
30
as a generator, the apu powers
Ps2 and PE bus
31
how does the apu power PS1
manual closing of the bus tie
32
aPU starter limitations
30 seconds on 3 minutes off 30 seconds on 3 minutes off 30 seconds on 30 minutes off
33
max transient EGT
1,400 to 1,5000 EGT for 15 seconds
34
do not attempt in-flight start of APU if
both main generators have failed (attempting to start will drain battery)
35
do not attempt start of APU if ____ engine has been shut down due to _____
left engine, engine fire or failure
36
max generator load APU
.8
37
max transient generator load
1.2 for less than 10 seconds
38
simultaneous operation of APU and engine bleed air
limited to 1 minutes
39
in flight operation of apu is prohibited in:
icing conditons
40
with main air valves and apu bleed operations running simultaneously
1 minute
41
no load before placing bleed air load on apu
2 minutes
42
between start attempts
3 minutes
43
how many lights of fire indication
6 or 7 it will be 7 if engine instruments are one Copilot's PFD
44
fire condition is indicated by
ENG 1 or ENG 2 FIRE look up ENG FIRE annunciator on FIRE panel FIRE message on N1 gauge REd MWS lights Associated HP cock warning lights fire bell
45
fire bell can be canceled by
pressing appropriate BELL CANCEL switch light locks switch into cancel position - white annunciator
46
where are the fire extinguishers
located in rear equipment bay
47
what is a dual head single use fire extinguisher
each bottle is capable of discharging its total contents into the ozone one of either engine both bottles can be discharge into a single engine, or one bottle into each engine
48
SHOT 1 is powered by
PE bus
49
SHOT 2 is powered by
PS2 recommended to push this one first in event of loss of generator power
50
warning circuits powered by
PE
51
fire system: what does it tell us
2 sensing elements, 2 responders, 2 zones something is hot - NOT that there is a fire
52
fire extinguisher pressure relief indicator
located under left pylon
53
if apu detects fire
automatically discharges within5 seconds after apu auto shutdown due to overheat
54
Engine fire extinguisher bottles are in the
rear equipment bay
55
the exterior preflight check of the fire extinguishers includes
checking the condition of two engine discharge indicators
56
the engine fire bell can be silenced
by pressing the BELL CANCEL switch
57
which statement is true regarding discharge of the fire bottles
when a visual fire warning appears, discharge SHOT 1 first then SHOT 2 if neccessary (Purdue recommends shot 2 before shot 1)
58
the following bus bars provide DC power for engine fire extinguisher operation
PE and PS2
59
a portable handheld fire extinguisher is stowed in the
cockpit and baggage compartment
60
for a fire in the apu
a switch on the apu control panel controls the firing of a separate fire extinguisher
61
the apu fire extinguisher automatically discharges _____ seconds after detection of the apu fire alarm
5 seconds

AT 354 (12 decks)

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