ORAL PREP Flashcards by Eric Robbins

What is the Volts AC, phase and Hz of the (2) engine driven generators?

115V AC, 3 phase, 400hz

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What KVA are the IDG’s?

30KVA up to FL 350.

From FL 350 to FL360 25 KVA

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What does the Constant Speed Drive (CSD) do?

turn a constant RPM to produce the steady 400Hz

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The AC utility bus provides AC power to the____and____.

galley

battery chargers

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In certain conditions, AC UTIL BUS 1 and AC UTIL BUS 2 are shed to prevent overloading of a single generator when?

With only one generator operating or flaps out of 0 degree position

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ADG will supply how much Volts AC, Hz and KVA?

115Vac, 400 Hz, 15 kVA

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What are the (3) sources of DC power?

DC Transformer rectifier units (TRU’s)
DC batteries
External DC power

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Where are the TRU’s located?

Unpressurized equipment compartment in the nose of the aircraft.

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What are the Voltage and Amps of the TRU’s

28V, 100 amps

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Where are the DC batteries located and how many amps and volts are they?

aft equipment compartment,
APU BATT 43 Amps 24V
MAIN BATT 17 Amps 24V

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Minimum volts for APU and Main battery is?

22Volts

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DC Switch supplies power to and connects what

NAV, LAV and DOM

Connects the DC SERV BUS to the APU and MAIN BATT DIR BUS

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If SERV TRU and TRU 1 and 2 fail what powers the DC battery BUS?

APU/MAIN BATT DIR BUS

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During ADG operations, the_____ powers_____ which in turn powers the____.

AC ESS BUS
ESS TRU 1
DC BATT BUS

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What happens when BATTERY MASTER is selected on

Connects the APU & MAIN BATTERY DIR BUSES to the DC BATTERY BUS

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Describe the DC EMER BUS

It provides power to the:
L&R Engine and APU fire bottle squibs
L&R Engine HYD SOV's
L&R Engine and APU fuel SOV's
EMS lights

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What activates the FDR

BEACON or STROBES on

Weight of Wheels

When are fuel boost pumps on

ELF

Engine Start
Low fuel pressure
Failure of Main Ejector Pump

L/R BOOST PUMP is powered by

L- DC BATT BUS

R-DC BUS 2

INOP will illuminate on fuel boost pumps when

Low pump pressure
Pump has failed
Pump not armed

When does fuel auto transfers happen

2 types

200 LBS difference in tanks. If occurs will add fuel to lower wing until 50 LBS over
With fuel in center tank and 94% detected will fill back to 100%

What is min fuel needed for takeoff alternate

4600 lbs due to flap AD

What’s needed for auto pilot to operate

1 yaw damper
Both fcc serviceable
At least 1 stab channel and no faults with pitch trim
No insignificant stability

What is in the Accessory Gear box

AAAEEE

Driven by the N2 compressor and consists of:
Associated AC IDG
Air Turbine Starter
Alternator that powers the N1 Control Amplifier
Engine oil pump
Engine driven HYD pump
Engine driven Fuel pump

What powers the ignitors A and B

A- AC ESS BUS | B-DC BATT BUS through a static inverter

What does N1 gauge represent

N1 represents the rotational speed of the low pressure compressor

What does N2 gauge represent

N2 represents the rotational speed of the high pressure compressor

Pulling the ADG Manual Deploy Handle ties

The DC Essential Bus to the Battery Bus. This provides power to the DC Essential Bus when the ADG is no longer at an operating speed. • This provides continued control of *Thrust Reversers*Captain’s Instruments* upon landing / go around / continued flight.

Fuel Control Unit (FCU)

A hydro mechanical metering device that supplies fuel in response to mechanical commands from the thrust levers.

Describe N1

Single stage fan rotor connected to a 4 stage low pressure turbine

Describe N2

14 stage Axial flow compressor rotor connected to a 2 stage high pressure turbine

The APR system is armed during Takeoff when

Weight off Wheels APR switches are armed Engine speed switches are selected on Both DCU's are operating On T/O roll above 79% RPM APR is activated for five mins. APR system monitors N1 RPM of both engines. If RPM of 67.6 or less is detected APR automatically commands both engines to increase N1 speed, only the operating engine will increase. Increases thrust to 9220 pounds of thrust (approx 2%)

How many PCU's are associated to | Rudder, Ailerons and Elevators

Rudder and Elevator has 3 PDU's | Ailerons have 2

Ram air is used for for

Cooling of PACKs and Heat exchangers Cooling HYD 1 and 2 Used for T/o and Lndg with Anti-ice on and APU differed to evacuate the cockpit of smoke and fumes On ground a small fan is used to draw air to assist in cooling

Shortest RWY an FO can land on

Greater than 5000 feet

What three oral warnings the DCU will not inhibit

Terrain Windshear EGPWS

Primary Flight Controls | EARS

Elevators Ailerons Rudders Spoilerons

Secondary Flight Controls | HARFF

``` Horizontal Stabilizer Trim Aileron Trim Rudder Trim Flight and Ground Spoilers Flaps ```

APU will shut down in flight for the following | FODERS

``` Fire Overspeed DC power loss ECU failure RPM signal loss Slow/abnormal start ```

1/2 bank automatically comes on when

31,600 feet

The Captain will conduct the takeoff (ground roll through clean-up) when visibility is:

* 1600 ft RVR or less for any RVR on that runway | * 1/4 statute mile or less (if no RVR is reported for that runway).