Oral Prep Questions Flashcards
What is the zero fuel weight
248,115kg
What is the weight limit for a last minute change
227kg
What are the different flight control mode
Primary controls - Normal, Secondary and Direct
Secondary controls - Primary, Secondary, Alternate
With primary flight controls in secondary what is not available
Gust Suppression
Autopilot
Yaw Dampener (Degraded)
Auto Speed Brakes
Thrust Asymmetry Compensation
Envelope Protection
With primary flight control in Direct what is lost
- All secondary loses
- Manual rudder trim switch
- Yaw dampener
During preflight you notice the ON BAT light next to the ADIRU
The ADIRU is on battery bus, horn in nose wheel will sound also
What happens if the ADIRU is shut off in flight
Nothing
What happens if the ADIRU fails in flight
SAARU automatically continues operation. Loss of position and automatic HDG data.
HDG must be entered into the CDU manually after 3 minutes.
When will the TAC begin compensating for YAW
- Greater than 70kts
- More than 10% thrust difference between engines
When will the TAC not be available
- Less than 70 pts
- Thrust reverse is applied
- System malfunction or loss of engine data
Can secondary mode be selected for primary flight controls
No
What are the two types of flight control computers
ACEs - Actuator Control Electronics
PFCs - Primary Flight Computer
If complete electrical failure occurs what control of the aircraft surfaces is available
Mechanical linkages to the stabiliser
Spoilers 4 and 11 mechanically linked
What will the APU on and no other power source what is powered
Both Main AC buses
What does the Primary External normally power
The right main AC bus
What does the secondary External normally power
The Left Main AC bus
What are the modes of operation for the APU
Attended and Unattended
What will cause APU shutdown in both modes
x10 Answers
- APU fire/inlet overtime
- Overspeed/ loss of overspeed protection
- Generator filter approaching bypass
- Intake door failure
- APU controller failure
- Speed droop
- No acceleration on start
- No combustion on start
EICAS in attended
- High EGT
- HOTLOP
What causes the APU to automatically start
Loss of power to both AC transfer buses. The RAT will automatically deploy as well
What is the purpose of the backup generators
To power one or both transfer buses
How many backup generators
two
Can both back up generators provide power to the transfer buses
No
When will the backup generators automatically provide power to transfer bus(es)
- Power to one or both Main AC buses is lost
- One AC generator (including APU)
- Approach mode is selected
- Testing
If emergency lights are armed what causes them to illuminate
- An armed exit is opened
- Loss of DC power
When does the supernumerary oxygen deploy
Cabin altitude 13,500ft
What conditions will cause the RAT to deploy
- Both engines failed with center hydraulic system pressure low
- Both AC transfer buses unpowered
- All three hydraulic system pressure is low
What conditions cause the seatbelt light to turn on when in AUTO
- Below 10,000ft
- Landing gear not up
- Flaps not up
What conditions will cause seatbelt lights to illuminate regardless of switch position
- Cabin altitude above 10,000ft
- Superneumery oxygen on
How are cargo fires detected
Smoke detectors in each zone.
8 zones main cargo deck
3 each FWD and AFT cargo deck
When does RTO become available
- On the ground
- Both thrust levers to idle
- Above 85kts
How are the Primary Flight Controls powered
- PMGs - PSA - Flight Control DC bus
- TRU - DC Main bus
- Hot Battery Bus
- RAT
When will the E/E cooling automatically configure to OVRD
- Both fans fail
- Smoke detected
- Low airflow detected
- LWR Cargo Fire ARM switch pushed
What happens when the E/E cooling is OVRD
- Both fans are OFF
- Overide valve is open
- FWD Cargo heat valve is closed
- NGS is OFF
- OVRD is illuminated
What controls flap positioning in all modes
FSEU - Flap, Slat, Electronic, Units
What protections available in Primary mode of secondary flight controls
- Load relief (Flaps)
- Autoslats
- Motion uncommanded
- Asymmetry flap/slat
What protections available in Secondary mode of secondary flight controls
- Load relief (Slats >256)
- Asymmetry flap/slat
- Motion uncommanded
Where will the slats travel when initially in secondary mode
Full position
Stall protection sequence of events
- Pitch Limit Indicators show near Min Maneuver speed
Top of Amber - Trim reference speed changes in nose up inhibited
Midway through AMber - AIRSPEED LOW displays
If A/T armed - A/T to THR mode and accelerates to min maneuver or MCP speed whichever is higher
When will auto slats work
- Primary mode only
- Flaps <25 degrees )Not in full position)
- Extends to full position with signal from stall computer, retracts after signal removed.
When is the wheel to rudder crosstie available
Less than 210kts
TAC is available and will compensate when
- Above 70kts
- More than 10% thrust difference between engines detected.
When is TAC unavailable
- Less than 70kts
- Thrust reverse
- Engine data is lost or system malfunction
When will the RAT deploy automatically
- Both AC transfer buses unpowered
- Both engines have failed and center hydraulic pressure low
- All three hydraulic system pressures low
What does the RAT power
Electrically - C1 and C2 TRU
Hydraulically - Center primary Flight Controls
What is available on the Hot Battery Bus
- Fire Protection
- ADIRU (if no other source)
What is the ground handling bus used to power
- Cargo loading/unloading
- Refueling/defueling
Ground service bus powers
- Cabin lighting and outlets
- APU and main battery charging
DC systems
- PFD’s
- ND’s
- GPS
- ADIRU
When will the backup generators supply power
- Power to one or more AC main buses lost
- Only one generator source (including APU)
- Approach mode is selected
- Initial test after engine start
How many backup generators supply power at once
One
What supplies standby power
Battery for at least 5 mins
How are the generators configured for autoland
- Left IDG supplies the left AC main bus
- Right IDG supplies the battery bus
- A backup generator powers the right AC Main bus
What EEC protections in Normal mode
- Over speed N1 and N2
- Thrust limit protection
What EEC protections available in alternate
- Overspeed N1 and N2
- Thrust reference
When will the a/c go into approach idle
- Flaps 25 or greater
- Engine anti ice on
- One hydraulics air demand pump is inoperative and flaps out of up
- The opposite engine bleed valve is closed
When will CAB ALT readout become AMBER
8500ft cabin altitude
When will the CABIN ALTITUDE EICAS warning display
10,00ft cabin altitude
