Sim Check Flashcards
How does CG change as fuel burns
With full Center tank the CG will move rearwards.
Once Center tanks are empty initially moves forward and then moves rearward again until an inner tank has approximately 5000lbs and the moves rapidly forward before moving rearward again
How is V1 calculated on Airbus
Uses an optimised V1 which allows for a higher RTOW
(limiting takeoff weight) and higher flex temperature and improved climb performance
What are advantages and disadvantages of using optimized V1
- Increase in V1 increases accelerate stop distance
- Allows for better climb performance
- Allows for a higher TOW
What does LB1 on flight plan mean
- L: Mode S transponder
- B1: ADBS out
What does R/UVE on flight plan mean
Radio
UHF - 243
VHF - 121.5
E - ELT
What does S/M on flight plan mean
Survival/Maritime
What does J/L on flight plan mean
Jackets (life jackets) with lights
What are considerations for RVMS
- W on flight plan
- Turbulence: greater than moderate then separation will be increased to 2000
- Aircraft equipment and condition
- 2 independent altimeters, one altitude keeping device, one altitude alert system, and on SSR transponder with mode C
What equipment is required for RVSM (6 items)
2 x ADRs
2 x PFD
1 x Autopilot
1 x FCU channel
1 x FWC
1 x ATC transponder
Altitude/deviation….limitation…RVMS
- FL 290 - FL 410
- Levelling off +/- 150 feet
- Crosscheck intervals of about an hour to ensure altimeters within 200 feet of each other
- Report required if deviation of 300 feet or more
What happens with failure of systems during RVSM
- Notify ATC
- “Unable RVSM due equipment”
- Follow ATC instructions
- Company and recalculate plan if required
What contingencies are required to be reported to ATC for RVSM failures (6 items)
- Failure of ALL automatic altitude control systems
- Loss of redundancy of altimetry systems
- Failure of all altitude reporting transponders
- Loss of thrust on engine requiring a descent
- Any other equipment failure resulting in being unable to maintain altitude
- Encountering greater than moderate turbulence
How is contingency fuel calculated
Greater of:
1. 5 minutes of holding fuel at 1500 feet over destination
2. 5% of BOF
3. Assumed to be consumed in planning but not for landing weight calculation
Explain side stick
- Used to exercise manual control of pitch and roll
- Not coupled mechanically
- Send seperate sets of signals to the flight control computers
- Pilot puts in an input, signal sent to the ELACS and SEC which then decide the amount of deflection to be ordered to the flight controls
- Has a take over button: AUTOPILOT disconnect and PRIORITY take over
- Radio communication trigger
Explain Fly by Wire
- Replaces mechanical linkage as found on conventional aircraft
- Pilot inputs do not directly move the flight control surfaces
- Computers process flight control inputs made by the pilot or autopilot
- Then sends electrical signals to flight control surface actuators to move the surfaces best to achieve the request
Advantages of Fly by Wire
- Reduced weight
- Improved reliability
- Allows for protections not provided by conventional aircraft
- More efficient operations
Explain the hydraulic system
- Three systems, Green, Blue and Yellow
- Each system and has its own reservoir and fluid, fluid CAN NOT be transferred between systems
- Normal system PSI is 3000 and when powered by the RAT becomes 2500 PSI
- Green and Yellow are powered by engine driven pumps
- Blue system is powered by an electric pump or by the Ram Air Turbine
- Yellow can also be powered by an electric pump to allow it to be pressurised on the ground and also by a hand pump for cargo door operation
- A Power Transfer Unit (PTU) allows G to pressurise Y and vice versa is pressure drops by 500 PSI
What does Green Hydraulic power (5 items)
- Landing Gear
- Normal brakes
- Engine 1 reverser
- Yaw damper 1
- Slats and flaps and other various flight controls
What does Yellow Hydraulic power (6 items)
- Nose wheel steering
- Alternate brakes and park brake
- Engine 2 reverser
- Yaw damper 2
- Cargo doors
- Various flight controls
What does Blue Hydraulic power
- Powers the Emergency Generator via the RAT
- Various flight controls
Explain the braking system
- Normal system is via the Green Hydraulic system and Alternate system uses Yellow System
- Has anti-skid and auto brake system
How does Anti skid work
- Provided maximum braking efficiency by maintaining the wheels at the limit of a skid
- At skid onset orders are sent to release the brake
- Deactivated below 20 kts ground speed
- Has an ON/OFF switch
How does Auto brake work
- Establish and maintains a selected deceleration rate
- Reduces the distance during an RTO
- Three setting, LO, MED and MAX
- MAX can not be armed in flight
- Activates at spoiler extension for LO and MED
- MAX activates at spoiler extension and speed above 40 knots
- Therefore RTO below 72 knots no AUTOBRAKE because spoilers don’t deploy
- Deactivated via press button, arming condition lost, after a touch and go, or by pressing on brake pedal
How does Alternate braking work
- As per normal braking, powered by Yellow Hydraulics
and backed up by a brake accumulator. - The Alternate Braking Control Unit (ABCU) electrically controls the alternate braking.
- If no ANTI SKID available then pressure limited to 1000 PSI