ORAL Flashcards
Purpose for the Central Bus?
Start APU
Connects System with 3 or less generators online
Connects GPU to system
How long do the Emergency Lights last?
15 minutes
How do you charge the Emergency Lights?
When in the ARMED position (own dedicated batteries)
What does the Backup Battery charge?
GCU protective function, EDL, and ISIS
How can you test the Backup Battery?
If you press the overhead button and the ISIS stays on, its a good test
What happens during ELEC EMERG ABNORM?
EDL improper configuration
In essential power when its not supposed to be
What happens during ELEC ESS XFER FAIL?
EDL improper configuration
Is not in essential power when its supposed to be
DC GEN Distribution with 4/5 or GPU
Right and left networks are isolated
All buses are energized
DC GEN Distribution with 3
Both networks are interconnected via bus ties
All buses are energized
DC GEN Distribution with 1/2
Ground: Both networks are interconnected via bus ties and shed only in OVRD
Air: Both networks are interconnected via bus ties without shed
DC GEN Distribution with 0
Ground: Batt last 10 minutes (all DC busses are powered)
Air: Batt last 40 minutes + 3 APU attempts (EDL forces ESS power)
Shed bus knob OFF?
Shed Bus contactors open
Shed bus knob AUTO?
EDL controls Shed bus contactors
Shed bus knob OVRD?
Shed bus contactors close if aircraft is on ground with 1 generator running
How do you know if an IC-600 has failed?
Captain side red X across MFD, PFD, and EICAS
FO side red X across MFD, PFD
What can you do if an IC-600 fails to get information
Select the SG button
What is the IC-600?
Graphic Card
Where does the DAU send information?
DAU -> IC-600 -> Display
What is the purpose of the DAU?
Collects information and work to monitor engine and aircraft systems
How many DAU channels are there?
2
A Primary
B Standby (ready to takeover incase A failure)
What is the trend vector for airspeed?
10 seconds
What is the trend vector for altitude?
6 seconds
What are the doors indicated on the MFD?
Forward Electronic
Under Cockpit Access
Main Door
Service Door
Fueling Door
2 Emergency Exits
Baggage Door
Aft Electronic
When is CAS inhibition activated for takeoff?
V1-15 kts
When is CAS inhibition deactivated for takeff?
Above 400 RA
Airspeed 60 knots
Or 1 minute incase of RA failure
When is CAS inhibition logic activated for landing?
200 RA
When is CAS inhibition logic deactivated for landing?
Weight on wheels
or 1 minute incase of Go-Around
How and where is the accessory gearbox connected?
Connected to the N2 spool via the towershaft
What accessories are on the accessory gearbox?
Hydraulic Pump
Air Turbine Starter
PMA
FPMU
Oil Pump
Generator
When does the PMA power the ignitors?
10% N2
When does the PMA power the FADEC?
50% N2
What is associated on the N1 fan?
3 stage LP turbine drives a 1 stage LP fan
What is associated on the N2 fan?
2 stage HP turbine drives a 14 stage HP fan
How many fan blades are on the compressor?
24
What stages comprise the compressor?
1 through 5: CVG, adjusted by fuel from the FPMU for compressor stalls
6 through 14: fixed stator blades
What is the max time a takeoff thrust mode can be used?
5 minutes
In case of engine failure, what will the ATTCS change the thrust setting to?
ALT T/O-1: T/O 1
T/O: T/O RSV
E T/O: E T/O RSV
What comes out the engine drain system?
Oil, hydraulics, fuel
What is the abort start criteria?
Unusual noise or vibration
Engine abnormalities
Flames
No light off within 10 seconds of fuel flow
Fuel flow drops to 0 after light off
ITT rapidily rises to 800 (hot start)
N2 decreases or remains steady for 5 seconds (hung start)
No N1 rotation prior to 57%N2
N2 does not reach 57% by 1 minute
What is the normal start sequence?
N2 rotation within 20 seconds
Oil pressure rises
14% N2: IGN
28% N2: Fuel Flow
ITT rises within 10 seconds of fuel flow
N1 rotation prior to 57% N2
Stabilized: 2-4-6, good pressure, good temps, good vibes
What happens if you get the warning ATTCS NO MRGN
FADEC thinks it does not have sufficient ITT or N2 margins in case of engine failure
Aircraft NOT safe to fly
What happens if you get the warning LOW N1
Engine not achieving requested N1
Aircraft NOT safe to fly
How many FADECS are there?
2 per engine
One primary, one monitoring
How do the FADECS talk to eachother?
The data bus
How are the FADECS powered?
Prior to 50% N2 powered by essential
After 50% N2 powered by PMA
When is an aircraft determined ‘Cold Soaked’
Temperature is 5ºC or less and engines been off for 90 minutes
IGN turned to ON
To increase above 83% N2 engine oil must be
40ºC or warmer
In regards to a cold engine, it must run at 8 minutes and temperature is
21ºC
How many channels are on the stall protection system?
2
How many stick shakers are there?
2 Stick Shakers
How many channels need to be active for the stick shakers to work?
1 channel
How many stick pushers are there?
1 stick pusher
How many channels need to be active for the stick pusher to work?
2 channels
When landing flaps 22, when do you need to increase VREF by 6kts?
Icing conditions encountered
SPS ice speeds
OAT 10ºC or less at landing
How does the landing gear retraction process work?
Lever up, LGEU, HYD SYS 1, DN lock and retraction, Up lock
How does the landing gear extension process work?
Lever DN, LGEU, HYD SYS 1, Up lock and extension, DN lock
When does the aural ‘LND GEAR’ Sound
Flaps 45, any altitude, any TLA
Any flap setting, below 1200 AGL, low TLA
What happens when you pull the free fall extension for the landing gear?
Pulling up de-preasurizes the system and releases the up locks
How many Air to ground sensors are there?
5
4 on the mains, 1 on the nose
When do you get the LG AIR/GND FAIL
When there are 4 signals and they do not agree
What does the nose gear sensor send signal to during WOW?
Thrust Reverser
Steering Control
Downlock release
What is the radius of the steering?
5º with rudder
71º with tiller
What is the process of braking?
Pedals, BCU, BCV, HYD SYS 1 (controls outboards 1 and 4) HYD SYS 2 (controls inboards 2 and 3).
What does the BCU do?
Monitors brake performance and sends signal to BCV
What does the BCV do?
Modulates brake pressure
What is the purpose of touchdown protection?
Prevents brake actuation before main wheel speed up
When does touchdown protection occur?
3 seconds from last WOW
or wheel speed greater than 50kts
What is the purpose of Locked Wheel Protection?
Relives brake pressure if they are not in sync
When does Locked Wheel Protection occur?
Wheel speed greater than 30kts
If one wheel is 30% difference, brake relieves pressure
What is the purpose of Anti-Skid Protection?
If BCU falls below average speed, pressure is relaxed
When does Anti-Skid Protection occur?
Wheel speed greater than 10kts
If 1 of 4 BCU falls below average speed, pressure is relaxed
When does thrust activation occur?
When WOW main speed is 25kts or greater
When does MAX thrust activation occur?
When WOW from nose gear or mains is 25kts or greater
How many locks are on the thrust reversers?
3 Locks
1 and 2 are electro-hydraulic
3 is electric
How does thrust reverse activation occur?
Ground sensor + thrust reverser actuation
What happens if a thrust reverser deploys in flight?
FADEC commands throttle to IDLE
What uses does the emergency brake actuator have?
24 hours of parking brake
6 emergency uses
How is the Elevator controlled?
Mechanical
Where are the Spring Tabs located and when are they useful?
Inboard
High speeds
Where are the Servo Tabs located and when are they useful?
Outboard
High and low speeds
How are the Ailerons controlled?
Cables trigger actuators HYD SYS 1 and 2
What side is the Torque Tube and Autopilot on for the Ailerons?
Left side
What side is the Artificial feel and Roll trim located for Ailerons?
Right side
How are the Rudders controlled?
Cables trigger actuators HYD SYS 1 and 2
How are the Spoilers and Speed Brakes controlled?
Electrical signal to HYD system
How does the flap system work?
FECU (brain) -> FPDU (gearbox with 2 motors)
What happens if one of the gearbox motors in the flaps fail?
Flaps will move 50% slower
What are the purpose of the Vortex Generators
Located on top of the wings - Prevent airflow seperation
What is the purpose of the Vortilons
Direct airflow over the wing, preventing the wingtip from stalling first
How does the rudder overboost protection work?
Above 135kts SYS 1 shutsoff
When can the speed brakes open?
Lever is set to open
TLR is lower than 50º
Flaps are set 0 to 9
When can the ground spoilers deploy?
Aircraft on the ground
Wheel speeds greater than 25kts
TLR lower than 30º
N2 less than 56%
How does rudder hardover protection occur?
Force on one pedal greater than 130Lb and rudder deflection greater than 5º opposite direction