Power plant

Question 0

What type of starter

Answer 0

Air turbine starter, drives gear box that drives the N2 section

Question 1

When does the start valve close

Answer 1

Stop switch light pressed or

When N2 is above 55%

Question 2

What happens when engine start switch pushed

Answer 2

• L and R 10th stage bleed SOVs open
• 10th stage ISOL valve open
• Start valve for associated engine

Question 3

N2 speed control

N1 speed control

Answer 3

Up to 79% N1 the FCU Hydromechanically controls the N2 speed
• above 79% N1 control amplifier controls the engine RPM, speed switches must be on for this to happen

Question 4

What equipment on the accessory gearbox

Answer 4

• Alternator N1 control amplifier
• Lubrication pumps
• HYD pumps
• Fuel pumps, FCU
• Integral Drive Generator IDG
• Air turbine starter

Question 5

Automatic Performance Reserve APR

When does it activate

Answer 5

• When an engine N1 decreases to 67.6% and the APR
is armed
• APR is armed above 79% N1

Question 6

IDG FAULT light

Answer 6

Hot temp

Lo oil pressure

Question 7

What powers the A&B ignition

Answer 7

A is AC essential bus

B is from DC battery bus through a static inverter

Question 8

Continuos Ignition

Answer 8

On automatically when approaching a stall

Question 9

Where is ITT measured

Answer 9

Between the high and low pressure turbine

Question 10

How is the T2 Probe Anti iced

Answer 10

Anti iced with 14th stage bleed air

Question 11

What is needed for the N1 control amplifier to work

Answer 11

Speed switches must be on

Question 12

What are the different jobs of the fuel system

Answer 12

• Provide motive flow for the ejector and scavenge pumps
• Lubricate and actuate servos in the FCU
• Cool engine oil
• Adjust VG (variable geometry) guide vanes and linkage

Question 13

What would happen if engine speed switches were turned off in flight

Answer 13

Increased ITT and RPM

Question 14

Does N2 need to be zero for the starter to be engaged

Answer 14

There starter can be engaged up to 55% N2

Question 15

Dry motoring limits

Answer 15

90 sec on 5 min off

30 sec on 5 mn off

Question 16

What systems monitor thrust lever position for operation

Answer 16

• Gear warning horn
• Takeoff config
• Ground lift dumping system
• Cabin pressurization

Question 17

What are the conditions for the Thrust Reversers to work

Answer 17

• weight on wheels or wheel speed is 16kts or more
• 14th stage bleed air valve open
• Switches in the armed position

Question 18

When will N1 fan indications be displayed on the EICAS

Answer 18

When oil pressure is in the normal range and both engines running

Question 19

When will N2 vibration levels be shown on th EICAS

Answer 19

Only when they are out the limit

Question 20

When should engine oil check be accomplished

Answer 20

15 min to 2hrs after shutdown

Question 21

What are the indications of a Hung Start

Answer 21

N2 stagnates around 40% with a fairly rapid rise in ITT

Question 22

When do the N1 vibration indications go away

Answer 22

Oil pressure below 25psi

Question 23

What is the correct procedure for aborting a hot start

Answer 23

• Thrust lever to shutoff
• Ignition off
• Dry motor until ITT is below 120c or starter limit of 60 sec

Question 24

What if you have to use DC power for start

Answer 24

• Use ignition B since it has a static inverter
• Start the left side since it will have oil indication
• Passenger loading

Question 25

Color Ranges for Oil Pressure

Answer 25

Red - 0-25psi
Green - 26 - 115 psi
Amber - 116-156psi

Question 26

Color ranges for Oil Temp

Answer 26

Green - (-40 to 154)
Amber - (155 to 162)
Red - (163 and above)