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erj > Oral > Flashcards

Oral Flashcards

1
Q

What happens if a power generating source fails?

A

Bus ties automatically connect to provide no system degradation

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2
Q

Can a single pack provide adequate temp control and pressurization?

A

Yes: up to FL310

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3
Q

What monitors and controls the IDG’s?

A

Each has a generator control unit (GCU)

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4
Q

Where are the Primary Ejector Pumps located?

In the collector tank

A

In the collector tank

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5
Q

How many different ways can fuel be supplied to the APU?

A
  • DC Fuel Pump (tank 2)
  • AC Fuel Pump (tank 2)
  • Tank 2 ejector pump
  • Tank 1 ejector pump via X-Feed
  • Tank 1 AC Fuel Pump via X-Feed
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6
Q

Will the APU automatically shutdown if speed and acceleration rate isn’t
reached in the starting cycle time?

A

Yes

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7
Q

Explain what happens in Hyd System 2 that allows us to safely conduct
a single engine taxi with only Engine 1 operating?

A

If in “AUTO” (and only engine 1 is operating) upon releasing the parking
brake ACMP 2 will activate to provide hyd power for nose wheel
steering and the inboard brakes.
What happens if smoke is detected in the recirculation bay?
• Both recirc fans deactivate
• Cargo recirc fan deactivates
• Cargo Outflow Valve closes

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8
Q

What is min. airspeed for the RAT?

What happens if speed drops below that value?

A

130kts or else Load shedding occurs below this speed

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9
Q

If “OFF” is selected on the ground at what point will the anti-ice system
become automatic?

A

1700 ft. AGL
or
2 minutes after takeoff (whichever happens first)

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10
Q

What is an SPDA?

A

An electrical load-mgmt unit powered by the ICC’s that distributes
electrical loads to aircraft systems according to distribution logic.

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11
Q

What sources are used for aircraft anti-icing and de-icing?

A
  • Bleed air heat

* Electric heat

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12
Q

What uses electric heat for ice protection?

A
  • Pitot-static system
  • Windshields
  • Water lines
  • Pressurization static port
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13
Q

What uses bleed air for ice protection?

A

Engine lips

3 outboard slats

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14
Q

What airplane systems have fire detection and protection?

A
  • Engines
  • APU
  • Cargo Compartments
  • Lavatories
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15
Q

What model PowerPlant is on our Ejet?

A

General Electric CF34-8E5, High-Bypass, Dual Rotor turbofan

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16
Q

Describe N2 spool?

A

10-stage compressor (gas generator)

2-stage HP turbine

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17
Q

What is the purpose of the scavenge pumps?

A

Maintains fuel level in the collector box

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18
Q

When will the “FUEL 1(2) LO LEVEL” EICAS be presented?

A

660 lb. of fuel remaining in the associated tank

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19
Q

What is the purpose of the DC GPU receptacle?

A

For APU start when BATT 2 is either:
Less than 22.5 VDC
or
Colder than -20 degrees

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20
Q

Describe the Engine and APU fire detection system?

A

Engine: 8 pneumatic fire detectors (2 loops) per engine
APU: 2 pneumatic fire detectors (2 loops)_

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21
Q

What does the RAT power?

A 
AC ESS BUSSES
Which powers:
• AC STBY BUS
• TRU ESS: directly powering DC ESS BUS 3 (which powers DC ESS
BUS 1 and 2 through ETC 1 and 2)
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22
Q

What components power the DC system?

A

2 NiCad batteries
3 Transformer Rectifier Units (TRU)
DC GPU receptacle

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23
Q

What components are protected from Ice and Rain?

A
  • Engine inlets
  • Wing leading edge
  • Smart probes
  • Windshields
  • Water and Waste drain systems
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24
Q

What happens when a cargo extinguishing button is pushed and smoke
has been detected?

A

• High-rate bottle discharges immediately
• Low-rate bottle discharges after 1 minute if the airplane is in flight
• if airplane is on the ground (WOW) the Low-Rate bottle will not
automatically discharge
What manages the electrical system?
4 Integrated Control Centers (ICC’s)
2 Secondary Power Distribution Assemblies (SPDA’s)

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25
Q

Describe in detail the normal engine start sequence?

A 
N2 parameters
• 7%: Ignition
• 20%: Fuel Flow
• 20% + 5 seconds: Light Off
• 50%: IGN Cutoff
• 50%: Starter Cutout
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26
Q

When will the crossbleed valve automatically open?

A
  • Only one side bleed source is available
  • Eng 2 start in the air
  • Eng 1 start in the air (if APU is not avail)
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27
Q

What is the primary purpose of the AC generators?

A

To power the AC busses and AC ESS Bus which:

Power the 3 Transformer Rectifier Units (TRU’s) 1 2 and ESS

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28
Q

Can a single bleed source power both packs?

A

Yes: through the crossbleed valve

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29
Q

How many Hyd. systems are on the airplane?

A

3 independent systems

Hyd 1, Hyd 2 and Hyd 3

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30
Q

How many hyd pumps are on the airplane?

A

6 total:
2 Eng driven pumps
4 AC motor pumps

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31
Q

What charges the batteries?

A

Any AC power source

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32
Q

What is the primary use for APU bleed air?

A
  • ECS on the ground
  • Engine starting on the ground
  • Electrical source
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33
Q

During flight can the low-rate bottle be discharged before the minute is
up?

A

Yes by pushing the extinguishing button again.

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34
Q

What is the primary purpose of Hyd sys 3?

A

Back-up for the Flight Controls

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35
Q

Is the ice protection system automatic?

A

Yes under normal conditions

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36
Q

What happens if there is a single bleed source failure?

A

The crossbleed automatically opens

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37
Q

How do you shutdown the APU immediately?

A

-APU emergency stop button -No 1-minute cool down period

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38
Q

What is the purpose of the Hyd system 3 accumulator?

A

Temporarily provides hydraulics to the flight controls during an electrical
emergency. (from the beginning of RAT deployment until AC ESS Bus
powers the AC pump 3A)

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39
Q

Can cargo extinguishing be used if no smoke is detected?

A

Yes. The high rate bottle extinguishing button must be pushed twice: -
once to arm the bottle and once to discharge the bottle. -The low-rate
bottle automatically discharges after one minute if in flight.

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40
Q

Describe N1 spool?

A

-Single-stage fan -4-stage LP turbine

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41
Q

How many ice detectors must be working to have icing detection?

A

One There are two for redundancy

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42
Q

How does the IDG maintain a stable power output?

A

A constant speed drive (CSD) attaches the IDG to the accessory gear
box

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43
Q

What cools the pre-cooler?

A

-On Ground: N1 fan -In Flight: N1 fan or Ram air

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44
Q

How do you know a GPU is connected and ready to provide electricity?

A

-GPU button displays AVAIL -GPU icon displayed on synoptic page -
Once GPU button pushed in “IN USE” is displayed

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45
Q

Where is fuel tank temp taken?

A

Where is fuel tank temp taken?

Left wing tank (-37 C min)

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46
Q

What events will cause an automatic shutdown of the APU IN FLIGHT?

A

-Overspeed -Underspeed -FADEC critical fault

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47
Q

When are ECS packs recovered?

A

Thrust Levers NOT at MAX and Airplane is 500 AFE with both engs
operating -Airplane is >9700 ft. MSL with one eng operating

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48
Q

What is the purpose of the DCMP?

A

Used for APU or eng start if AC power or the ACMP is not available.

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49
Q

When does the RAT automatically deploy?

A

If both AC buses lose power inflight (electrical emergency)

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50
Q

What is normal pressure for any engine operation?

A

about 45 psi

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51
Q

How many networks make up the electrical system on the airplane?
Why?

A

-2 independent networks -Redundancy and fault isolation

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52
Q

If “ALL” is selected on the ground at what point will the anti-ice system
become automatic?

A

1700 ft. AGL or 5 minutes after takeoff (whichever happens first)

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53
Q

What is the fuel source for the APU?

A

-Right fuel tank -Left fuel tank through the Crossfeed valve

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54
Q

What happens if the APU EMER STOP button is pushed after a fire has
been detected?

A

-APU shuts off immediately without a 1-minute cool-down -APU fuel
SOV closes -APU FIRE EXTG button illuminates

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55
Q

What is the purpose of the forward cargo compartment recirculation fan
shutting off and the ventilation outflow valve closing when smoke is
detected?

A

-Prevents oxygen from entering the compartment -Prevents Halon
agent from escaping into the aircraft’s cabin

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56
Q

If an IDG is manually disconnected can it be reconnected by the flight
crew?

A

No. This is a maintenance function

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57
Q

What compressor stage is bleed air tapped for anti-icing operations?

A

10th High stage valve (HSV)

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58
Q

Can the APU shutdown be cancelled?

A

Yes: by moving the START switch back to “ON” before the 1-minute
cool down is over.

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59
Q

What is the Normal AC Electrical Priority?

A

Onside (IDG) Inside (APU) Outside (GPU) Cross-Side (Opposite IDG)

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60
Q

What events will cause an automatic shutdown of the APU on the
GROUND?

A

FOULFO -FADEC critical fault -Overspeed -Underspeed -Low oil

pressure -Fire -Overheat

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61
Q

What does the overheat detection system (ODS) observe?

A

-Eengine bleeds and packs -APU Bleed -Plumbing For the wing &
Eng anti-icing systems

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62
Q

What happens if a channel fails in the AMS controller?

A

The remaining channel is able to control the entire AMS.

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63
Q

Will the APU automatically shut down if a fire is detected?

A

Only on the ground

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64
Q

What fuel pump is used for APU start?

A

-Batteries “ON” only DC fuel pump in right tank -AC powered airplane
ACMP 2 -Right engine running Ejector fuel pump

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65
Q

How are the engines and APU protected from fire?

A

-Engines 2 Halon fire bottles -APU 1 Halon fire bottle dedicated to the
APU only

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66
Q

What’s on DC Hot Bus 1?

A

-Eng 1A/2A Fire Extinguisher -Eng Fuel Shutoff Valve 1 -Hyd Shutoff
Valve 1-Eng 1 oil level indication -Courtesy/Service Lights -DC Ceiling
Lights

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67
Q

What is the min battery voltage to close the battery bus-ties?

A

18 volts

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68
Q

In manual mode will the cabin depressurize on landing?

A

No

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69
Q

Will the APU fire extinguisher automatically discharge?

A

No

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70
Q

What will happen if batteries are turned OFF during the 1-minute cool
down period?

A

The APU will shut down immediately

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71
Q

What is on the AC STANDBY BUS?

A

Eng exciters 1A and 2A

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72
Q

What happens if the wiper is operated on a dry windshield?

A

-The wiper will stop -To reset wiper move switch to “OFF”

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73
Q

How many igniters activate for engine start?

A

-Ground…1 igniter (switch in AUTO) -Flight…2 igniters (switch in AUTO)

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74
Q

Can one bottle be used for one compartment and the other bottle for the
other compartment? (cargo compartment)

A

No. Only one compartment may be selected (FWD or AFT)

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75
Q

When will the PTU automatically activate?

A

During T/O and LDG with flaps >0 IF -Eng 2 fails OR -Eng Driven Pump
2 fails

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76
Q

Can engine bleed air flow-back to the APU?

A

No. A check valve prevents flow-back.

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77
Q

What kind of APU is on the aircraft?

A

Sundstrand APS 2300

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78
Q

If the airplane is using the GPU and the APU is started what should the
pilot be sure to do?

A

Remember to deselect the GPU button before the next GPU connection

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79
Q

How long will the aircraft’s batteries last with no recharging?

A

Approx. 10 minutes

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80
Q

What are the basic components of the hyd systems?

A

-Reservoir -Pumps -Accumulators

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81
Q

What is bleed air used for?

A

-ECS (heating and cooling) -Engine start -Engine and wing anti-icing -
Water pressurization

82
Q

Can the APU replace a failed IDG

A

Yes

83
Q

In an electrical emergency can Hyd sys 3 power requirements possibly
overload the RAT?

A

No. A flow limiter valve is used to reduce hyd fluid flow and limits Hyd
pump electrical power draw to prevent a RAT stall.

84
Q

Where is the external ground source pneumatic panel located?

A

Lower fairing between the wings

85
Q

When is the RAT icon displayed on the electrical synoptic page?

A

When the RAT is deployed

86
Q

What is the only way to close the engine fuel SOV?

A

Pull the associated engine fire extinguishing handle

87
Q

How does the failure of one of the two power sources affect the
windshield heating system?

A

-On ground inhibited -in flight Left side is heated (right side heats if Left
has failed)

88
Q

What provides air for the AMS?

A

-Engine bleeds -APU Bleed -External pneumatic source

89
Q

Are the cockpit and cabin protected from fire?

A

-Yes -Cockpit 1 hand-held Halon fire extinguisher -Cabin 3 hand-held
Halon fire extinguishers (1 fwd and 2 aft) -Cabin 1 hand-held Water fire
extinguisher

90
Q

Can the igniters be turned off during flight?

A

The switch may be moved to the off position but the FADEC

DISREGARDS the COMMAND-the off position is Used For dry-
motoring on the ground only

91
Q

What is an indication of an APU fire?

A

-Fire Bell -Red stripe in the EMER STOP button -APU Fire is displayed
on the EICAS

92
Q

If there a total loss of power during the gap between RAT deployment
and when it produces useful electrical power?

A

No. Batteries supply power to the DC ESS Busses and AC Standby Bus

93
Q

What is the difference between the high-rate bottle and the low-rate
bottle? (cargo compartment)

A

-High-rate bottle saturates the compartment immediately -Low-rate
bottle maintains saturation over 60 mins

94
Q

Can one IDG supply the entire electrical system?

A

Yes

95
Q

What is the Primary ejector pump?

A

-Venturi pump (no moving parts, no electrical power) -Powered by
motive flow only

96
Q

The FADEC will prevent fuel flow during ground start until ITT is at or
below_____?

A

120*C

97
Q

What happens when the ignition switch is selected to OVRD?

A

Activates both igniters ON THE GROUND OR IN FLIGHT

98
Q

What battery is used for the APU start?

A

-BATT 2 powers the APU start bus -BATT 1 powers the FADEC and
EICAS for monitoring

99
Q

What powers the Refueling and Defueling panel?

A

Powered by BATT 2 or DC Buses

100
Q

Can the pilot override the automatic system?

A

Yes

101
Q

What is external pneumatic air used for?

A

-ECS on the ground -Engine start on the ground

102
Q

What does the cyan N1 tick represent?

A

Max N1 for selected engine thrust mode

103
Q

What is the ratio of fresh air to recirculated air?

A

52% FRESH air to 48% RECIRCULATED air

104
Q

What keeps the FWD & CTR E-BAY’s cool?

A

3 fans each pull air from cabin to bay

105
Q

What keeps the AFT E-BAY cool?

A

Natural air-flow from cabin to bay

106
Q

When is the Emergency Ram Air Ventilation activated?

A

-Both packs commanded or failed OFF below 25000 ft. (via left side and
electronically controlled) -Ram air pressure greater than cabin pressure

(differential pressure via right side) via one-way check valve No
electrical power required

107
Q

If engine and APU bleed air are both avail simultaneously which has
priority?

A

APU has priority if:-Aircraft is on the ground-Wheel speed

108
Q

What is the purpose of the pre-cooler?

A

Cools the bleed air coming from the engine to the AMS

109
Q

What powers the Ram Air Turbine (RAT)?

A

Airflow turns the RAT propeller which spins the generator turbine inside.

110
Q

How many brake applications does the hyd accumulator provide?

A

About 6 applications

111
Q

List the things that the air in the Air Mgmt System (AMS) used for?

A

-ECS (heating and cooling) -Engine Start-Pressurization -Eng and Wing
Anti-ice -Water pressure -Hot air leak detection

112
Q

How long will the low-rate bottle remain active in the compartment?
(cargo compartment)

A

60 minutes

113
Q

Where is bleed air tapped from the engines?

A

-6th and 10th stage compressors (Eng Bleed valve and High stage
valve respectively) -System alternates between valves to regulate an
adequate and safe pressure

114
Q

When do the smart probes heat?

A

When an engine is running

115
Q

When are the recirculation fans commanded off?

A

-Cockpit switch -Smoke detected in the recirc bay -DUMP button is
pressed -Respective pack is commanded “OFF”

116
Q

What kind of APU? Rating?

A

Sundstrand APS 2300 115VAC 400Hz 40KVA

117
Q

How long will the de-icing system remain on after icing is no longer
detected?

A

5 minutes

118
Q

What are SPDA’s and what do they do?

A

-Secondary Power Distribution Assemblies -Electrical load mgmt unit -
Receives power from ICC’s -Distributes power according to system logic

119
Q

What does the “TIMER” selection on the windshield wiper switch do?

A

Activates the associated wiper in 8-second intervals

120
Q

What exactly does the ATTCS do?

A

-Provides max thrust (RSV) when thrust levers TOGA AND -Difference

between N1 values >15% OR -One engine failure during takeoff or go-
around OR -Windshear detection

121
Q

What is the purpose of the accumulator?

A

-Maintains constant pressure by covering transient demands -Helps to
avoid pump cavitation

122
Q

Which pumps provide motive flow to the ejector pumps and are the
primary fuel source to the engine?

A

The engine driven pumps

123
Q

How many ECS packs are on the airplane? What provides air for the
packs?

A

-2 independent packs (left & right) -Each engine provides bleed air
to its’s respective pack

124
Q

What systems use hydraulic power?

A

-Flight controls -Spoilers -Landing gear -Nose wheel steering -Wheel
brakes -Thrust reversers

125
Q

What controls the APU?

A

A dedicated FADEC

126
Q

How is single eng taxi possible if nose wheel steering is on Hyd system
2?

A

Releasing the parking brake automatically activates AC Hyd pump 2

127
Q

How many channels on the Cabin Pressure Control (CPC)?

A

2 channels (one active and one in standby mode)

128
Q

What happens to the forward cargo compartment in the event smoke is
detected?

A

-Recirculation fan shuts off -Ventilation outflow valve Closes

129
Q

Can hydraulic fluid be transferred between each system?

A

No

130
Q

What does selecting “ALL” on the MCDU provide?

A

-Engine anti-ice “ON” when engines are running -Wing anti-ice “ON” at
40 kts wheel speed

131
Q

How many channels does each FADEC have?

A

Each FADEC has 2 channels:-1 Active-1 Standby

132
Q

What does moving the APU start switch to “OFF” do?

A

-Initiates normal APU shutdown -1-minute cool down -No pneumatics
(electrics only for 1 minute)

133
Q

What is the purpose of the ACMP?

A

-Back-up pump in case Primary ejector pump fails -Engine start -
Crossfeed operations

134
Q

Why are Hyd AC motor pumps 3A and 3B switch positions different?
““ON”” & ““AUTO”” respectively?”

A

-Hyd AC motor pump 3A is primary and has no automation-Hyd AC
motor pump 3B is a back-up and automatically activates if AC motor
pump 3A fails

135
Q

What are some important items controlled by Hyd system 2?

A

-Landing gear -Nose wheel steering -Inboard brakes

136
Q

How is ice detected in flight?

A

-2 ice detectors -Vibrating sensor element changes frequency when ice
builds up around it -One ice is detected sensor element heats ice melts
the normal vibration resumes and the heating process stops -Cycle
repeats as ice rebuilds on the probes

137
Q

What are some things that will close the ECS packs?

A

-Any Eng start if APU is the Bleed source -Eng start on the ground -
Respective Bleed system duct leak -Bleed air source not AVAIL For the
pack -Thrust Levers set to MAX on Takeoff -REF anti-ice set to ALL on
Takeoff -REF ECS set to off on MCDU (APU is off)

138
Q

What controls the ATTCS?

A

Controlled by FADEC

139
Q

What is the bleed system priority in flight?

A

-Onside engine -Opposite side engine -APU (if AVAIL)

140
Q

What types of fuel pumps are in each wing?

A

-Primary ejector pump -ACMP -DCMP (right tank only)-3 scavenge
ejector pumps

141
Q

Where does the CPC get Landing field elevation?

A

FMS or can be manually selected

142
Q

What is an ICC?

A

An electrical control device which provides power distribution and
protection for electrical loads.

143
Q

What is the min battery temp for APU start?

A

-20 degrees Celsius

144
Q

What is the surge/vent tank?

A

Collects fuel during wing-down maneuvers and returns it to the main
tanks Once the wings are level, equalizes tank pressure with
atmosphere in flight and during refueling

145
Q

How can the low-rate bottle be discharged if the airplane is on the
ground (WOW)?

A

The extinguishing button must be pushed again.

146
Q

When will the RAT deploy?

A

-Automatically deploys if AC busses are not powered or -Manually by
pilot

147
Q

What does the N1 moving arc represent?

A

value requested based on TLA (Thrust Lever Angle)

148
Q

What happens if the APU EMER STOP button is not pushed after a fire
has been detected?

A

After one minute the APU FIRE EXTG button illuminates

149
Q

What is the power source for engine and APU fire detection and
protection?

A

-Engine Detection DC ESS -Engine Protection HOT BATT- -APU

Detection DC ESS -APU Protection DC ESS

150
Q

What is the purpose of the TRU’s?

A

To convert 115VAC to 28VDC

151
Q

How many fuel tanks does the airplane have?

A

2 integral tanks

152
Q

What is the purpose of the fuel collector box?

A

-Keeps fuel pumps submerged -Ensures constant fuel flow to respective
engine

153
Q

How should the aircraft be configured for de-icing?

A

-Bleeds……………….OFF -Stab Trim…………..Full Nose down -
Flaps………………….UP -Engines & APU…ON or OFF

154
Q

Is there a test for the anti-ice system?

A

Yes but maintenance performs this test

155
Q

What controls the engine?

A

A two channel FADEC (One channel is active and the other channel
remains in standby as a backup)

156
Q

What does it mean when the GPU AVAIL light is illuminated in the
cockpit and the outside GPU panel displays IN USE outside?

A

The ground service bus is being powered by the GPU even though
cockpit GPU button has not been pushed in.

157
Q

What’s on DC Hot Bus 2?

A

-Eng 1B/2B Fire Extinguisher -Eng Fuel Shutoff Valve 2 -Hyd Shutoff
Valve 2 -Eng 2 oil level indication -CMC (Central Maint. Computer) -

Panel Refuel -Water and Waste System

158
Q

What is the RAT rated at?

A

115VAC 400Hz 15KVA

159
Q

How many AMS controllers are installed?

A

One controller with 2 channels which control the respective onside
system.

160
Q

How many igniters per engine?

A

2

161
Q

What components power the AC system?

A

-2 Integrated Drive Generators (IDG) -Auxilliary Power Unit (APU) -
Inverter-Ram Air Turbine (RAT) -AC GPU receptacle

162
Q

Describe the APU

A
  • Constant speed -Single-stage impeller with a 2-stage axial-flow turbine
  • Independent oil system
163
Q

Is only one FADEC channel used every flight?

A

No. They automatically alternate with each engine start.

164
Q

How many accumulators does Hyd system 1 and 2 have?

A

2 accumulators per system (One for shock absorption, the other for
emergency parking brake use)

165
Q

What does the green N1 tick represent?

A

Max N1 allowed for current thrust rating and current operating
conditions

166
Q

What is the purpose of the Fuel Crossfeed?

A

-Allows fuel to both engines from one tank -Used to correct fuel
imbalance

167
Q

How long after deployment before the RAT will supply power?

A

Approx. 8 seconds

168
Q

Can both engine fire bottles be used for one engine if needed?

A

Yes

169
Q

How many extinguishing bottles are installed for the cargo

compartments?

A

-2 bottles used for both compartments -1 high-rate bottle and 1 low-rate
bottle

170
Q

How many engine driven generators? Rating?

A

2 IDG’s (Integrated Drive Generators) 115 VAC 400Hz 40KVA

171
Q

What happens when the crossfeed switch is selected to LOW 1?

A

-Crossfeed valve is opened -Commands the ACMP 2 to “ON” to provide
fuel from the right tank to both engines

172
Q

Can fuel be transferred from tank-to-tank or be dumped overboard?

A

No

173
Q

Can the cabin altitude be raised higher than 12400 ft.?

A

-Yes by using manual mode -Cabin altitude will rise due to natural leak

174
Q

What color is the LFE on the EICAS?

A

-Green FMS input-Cyan Manual input (an “M” will be in front of LFE)

175
Q

What is the ABORT mode?

A

Cabin is scheduled back to the takeoff altitude if: -Airplane stops
climbing AND -Begins a descent AND -Airplane has not climbed >5000
ft AFE or >10000 ft MSL

176
Q

If an engine fails does the opposite wing and engine receive ice
protection?

A

-The cross-bleed valve opens, provides A/I protection for both wings -
The failed engine does not receive Engine Cowl A/I

177
Q

What is a PTU?

A

-Power Transfer Unit -Mechanical pump that uses Hyd sys 1 power to
provide Hyd sys 2 pressure

178
Q

What is the purpose of the inverter?

A

Converts 28VDC from the batteries to 115VAC to power the AC

STANDBY BUS when an AC source is not available.

179
Q

What pump is used once an engine is started?

A

Associated primary ejector pump

180
Q

How many fuel pumps do we have on the EJET?

A

-2 eng driven -2 ejector -6 scavenge -2 AC electric -1 DC electric

181
Q

Which if any Hyd AC motor pump will function if the RAT is the only
power source?

A

Hyd AC motor pump 3A only

182
Q

How is each FADEC powered?

A

-ESS powered below 50% N2 -PMA powered above 50% N2

183
Q

What happens when the dump button is pressed?

A

-Commands both ECS packs OFF -Opens outflow valve and raises the
cabin to 12400 ft. at a rate of 2000 fpm

184
Q

How is bleed air directed for pneumatic anti-ice?

A

-Engines are independent -Wings from Onside Bleed

185
Q

What are ICC’s? What do they do?

A

-Integrated Control Center -4 installed in various electronic bays -
Collects and confirm power is safe -Sends power to SPDA’s

186
Q

Can the flight crew reset the ICC and SPDA remote electronic CB’s?

A

-ICC CB’s can only be reset by Maintenance -SPDA CB’s can be reset
bia the MCDU

187
Q

Can the APU be used to provide bleed air for de-icing?

A

No.

188
Q

What is the max thrust produced by the CF34-8E5?

A

Max Thrust 14200 lbs.

189
Q

What happens when an engine fire handle is pulled?

A

-Closes engine Fuel SOV -Closes engine Hydraulic SOV -Closes

engine Bleed SOV

190
Q

How are the lavs protected from fire?

A

Heat-sensitive extinguishers in the lav waste bins (auto discharge at
predetermined temp)

191
Q

What events automatically activate an AC Hyd pump INFLIGHT?

A

-Engine driven pump failure OR -Flaps selected to any position greater
than 0

192
Q

What is the primary purpose of the PTU?

A

To allow landing gear retraction in the event of an Eng 2 or Eng Driven
Pump 2 failure.

193
Q

Where does the CPCS get cruise flight level & landing elevation from?

A

FMS before Takeoff or CPCS calculates using ambient pressure-LFE
may be Manually imputted

194
Q

Do both loops in the AMS overheat detection system have to function in
order to detect an overheat condition?

A

Yes but if one fails the other will work alone to detect an overheat.

195
Q

What happens if while on the GPU you then start an engine?

A

The respective IDG takes priority over the GPU and will now power it’s
side of the network while the GPU continues to power the other side.

196
Q

What will cause the amber IDG light on the overhead panel to

illuminate?

A

High oil temperature-Low oil pressure

197
Q

Can the APU be started after a critical fault?

A

No

198
Q

What events automatically activate an AC Hyd pump on the GROUND?

A

-Flaps selected to any position greater than 0 AND -Thrust levers set to
T/O thrust OR groundspeed >50 kts

199
Q

During an electrical emergency what provides Hyd pressure to the flight
controls until the RAT comes online?

A

-Hyd system 3 accumulator -After 8 seconds the RAT will power Hyd
AC motor pump 3A

200
Q

What bus is powered by the RAT?

A

AC ESS (Directly powers AC ESS which powers TRU ESS, which
powers DC ESS BUS 3 which powers DC ESS BUS 1 and 2 through
ETC 1 and 2)

201
Q

How many smoke detectors are installed in the cargo compartments?

A

-3 detectors in the FWD compartment -2 detectors in the AFT

compartment

erj (30 decks)

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