Overhead Panel Flashcards by Karl Hungus

AC source priority

Respective IDG
APU generator
GPU
Opposite side IDG

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IDG oil indicator illuminated for

HOTLOP

High oil temperature
Low oil pressure

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Charge the batteries with AC GPU if voltage is below…

22.0 Volts

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DC GPU powers the…

APU start bus

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Below what #2 battery temperature do you use the DC GPU?

-20 C

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HOT BATT BUS 1 powers…

Eng 1A and 2A fire extinguisher

Eng fuel SOV 1

Hyd SOV 1

Eng 1 oil level indication

Courtesy/service lights fwd

DC ceiling lights

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HOT BATT BUS 2 powers…

Eng 1B and 2B fire extinguisher

Eng fuel SOV 2

Hyd SOV 2

Eng 2 oil level indication

Refueling panel

Water/waste controller

CMC

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Wait until which messages appear before turning off the batteries

APU off

APU FUEL SOV CLSD

(approx 80 sec)

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Call MX if battery voltage is below…

21.0 Volts

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6 sources of AC power

Two IDGs

APU generator

RAT

AC/DC inverter

AC GPU

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6 sources of DC power

3 TRUs

2 batteries

DC GPU

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How many ICCs and what do they do?

4 ICCs

Collect and confirm power then sends to the SPDAs

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How man SPDAs?

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What do the MAUs do?

Process inputs for complex system logic

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What is powered on initial power-up/electrical emergency?

Guidance panel

DU 2/3

IESS

Clock

MCDU 2

CCD 1

Audio control panels

Compass light

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Which two systems can be load shed?

Galleys

Right windshield heat

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3 things the annunciators test button does not test

Parking brake ON light

AC GPU button

Fire indications

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What is closed when you pull the fire handle?

Engine bleed SOV

Fuel SOV

Hydraulic SOV

Crossbleed SOV

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What are the Engine Fire Indications?

Fire handle

ENG (1)(2) FIRE on EICAS

Master Warning triple chime

Fire bell

ITT FIRE

Master Warning Lights

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How do you know the fire condition is extinguished?

Fire handle not illuminated

EICAS message disappeared

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How many fire detection loops?

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FUEL IMBALANCE EICAS appears when?

When does it clear?

What is the Republic fuel balance limit?

800 lbs

100 lbs

790 lbs

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Can you takeoff with the FUEL IMBALANCE EICAS message?

Yes if fuel is within 790 lbs and the crossfeed is off

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Which fuel pumps are in the left wing tank?

Ejector pump

AC electric pump

3 Scavenge ejector pumps

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Which fuel pumps are in the right wing tank?

Ejector pump AC electric pump 3 Scavenge ejector pumps DC electric pump

What do the scavenge pumps do?

Maintain level in the collector tank, and keep the primary pumps submerged

Fuel pump priority system logic...

Primary ejector pump AC pump DC pump

Once illuminated, the emergency lights last approximately...

10 minutes

How many Emergency Light Power Units (ELPUs) and where are they located?

4 (2 FWD and 2 AFT)

Which systems have fire detection and extinguishing capabilities?

Engines APU Cargo compartments Lavatory

How many portable fire extinguishers and where are they located?

5 1 Flight deck 2 FWD cabin 2 AFT cabin

How long does the high rate bottle discharge?

60 seconds

How long does the low rate bottle discharge?

75 minutes

Can you use the fire bottles in separate cargo compartments?

No, both must be used in one cargo compartment

What happens after smoke is detected in the FWD cargo compartment?

Circulation fan turns off and the ventilation outflow valve closes Fire bell Triple chime Master warning lights Extinguisher button illuminates CRG FWD(AFT) SMOKE

Hold the fire detection test button for more than how many seconds but less than how many seconds?

More than 3, but less than 10 APU will shut down if held longer than 10 seconds

What happens when smoke is detected in the lavatory?

Master warning lights EICAS LAV SMOKE Lavatory alarm sounds and detector light illuminates Flashing orange rainbow light

APU fire extinguisher button illuminated when...

There is a fire and the APU EMER STOP button is pressed 1 minute has passed without the APU EMER STOP button being pressed

What happens when you press the APU FIRE EXTINGUISHER button?

Discharged the fire bottle Shuts down the APU Closes the APU fuel SOV

What are the indications of an APU fire?

Triple chime Fire bell Red stripe illuminates APU FIRE on EICAS Master warning lights

What should you do prior to pressing the APU fire extinguisher button?

Press the APU EMER STOP button

What do battery 1 and 2 do for an APU start?

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

Max altitude for APU start

30,000’

Max altitude for APU bleed

15,000’

Max altitude APU can be used for air start of a motor

21,000’

Max APU altitude

33,000’

Can the APU supply bleed for anti-ice?

When do the AC hydraulic pumps activate in flight?

EDP or engine failure Flaps > 0%

When do the AC hydraulic pumps activate on the ground?

Flaps > 0% AND TL set to takeoff OR Groundspeed > 50 KTS

Which AC hydraulic pump is used for single engine taxi logic?

AC pump 2 Engine 1 running with parking brake released

Which items are on HYD system 2 that are not on HYD system 1?

Nosewheel steering Inboard brakes

PTU activates automatically during TO/LDG if ENG 2 or EDP 2 fails and all of the following:

Flaps not 0% EDP 1 not fail HYD reservoir 2 > 12%

Does the PTU work on the ground?

What is the PTU and how is it powered?

Assist for landing gear extension/retraction It is a pump in HYD 2 driven/powered by a motor in HYD 1

Which bus powers HYD pump 3A?

AC ESS BUS (electrical emergency)

How are the flight controls powered between RAT deployment and AC ESS BUS being powered?

HYD 3 accumulator pressure

Which aircraft systems are hydraulically powered?

Primary and Secondary flight controls Landing gear Brakes Nosewheel steering Thrust reversers Spoilers

If pressurization system LFE is not being displayed, what must you do in the FMS?

Close the flight plan

What does the DUMP button do?

Turns off the ECS packs and recirculation fans Commands outflow valve to maintain 2000’/min up to 12,400’ Closes outflow valve at 12,400’

Which components make up the pressurization system?

Outflow valve Static pressure port Negative pressure relief valve Positive pressure relief valve Cabin pressure controller

How many AC sources are required for windshield heat?

2 Left is primary if less than 2 sources, left failure will activate right side heat

Engine cowl heat is provided by...

Respective engine high stage bleed

Engine anti-ice valves are fail safe open or closed?

Open

Can you supply anti-ice heat to the cowl of a failed engine?

Which slats are heated?

3 outboard

How are the slats heated?

Respective engine bleed air, or opposite side via crossbleed in the event of engine failure

In auto mode, how long are the wings and engines heated after detection?

2-5 minutes after icing condition is no longer detected

Anti-ice mode selector to ON when on the ground, when does the system activate?

Engines heated whenever an engine is running Wings are heated above 40 KTS if MCDU is set to ALL Wings are heated at liftoff if MCDU is set to OFF

When does the wing anti-ice test itself?

10 minutes after takeoff OR 10,000’ AGL, whichever occurs first

MCDU anti-ice set to OFF, when will the system activate after takeoff?

Inhibited closed until 1700’ AGL or 2 minutes after liftoff, whichever occurs first

Which systems are electrically heated and when is the heat activated?

ADSP, TAT probes, windshields, water lines, pressurization static ports Heated whenever an engine is running

What indication is present to notify of a bleed air leak?

Amber striped bar in the BLEED 1(2) buttons

Three sources of bleed air?

Engines APU Huffer cart

AMS provides bleed air to which systems?

ECS (heating and cooling) Engine starters Pressurization system Engine and wing anti-ice Water pressure Hot air leak detection

Where is engine bleed tapped from?

6th and 10th stage compressors | EBV and HSV

Can a single bleed source power both packs?

Yes

Maximum altitude a single pack can provide temperature and pressurization control?

31,000’

When are passenger oxygen masks automatically deployed?

14,000-14,750’

How long does passenger oxygen last?

Approximately 12 minutes