Personal Flashcards
What does Pitot-Static 3 feed?
CPAM (Cabin Pressure Acquisition Module)
ISIS
Which side of the aircraft front are each Static ports?
Odd # static (1 and 3) on the left and even # on right.
Which Pitot-Static power ADC #1?
Pitot 1 plus Static 1 and 4
Which Pitot-Static power ADC #2?
Pitot 2 plus Static 2 and 3
When one fuel boost pump fail, at what fuel pressure will the other pumps come on?
Below 6.5 psi
In the fuel system, what does the pressure relief valve do?
Allows expanding fuel (from cold to hot) to go back to the wing tank.
What keeps the collector box full of fuel?
Flapper valves and Motive flow/Ejector/Venturi pump which requires at least one boost pump operating.
Up to what altitude is the suction feed being sucked by FPMU to feed the engine in case all boost pumps fail?
Up to 25,000’
Which tank is the fuel temp measured from and where is it displayed?
Left tank and on the MFD.
Why is the hydraulic reservoir pressurized?
To avoid system cavitation.
Where is the engine driven hydraulic pump located?
In the accessory gear box
Where is the electric driven hydraulic pump located?
In the hydraulic bay
If you encounter icing conditions, what do you do?
Check windshield edges for any ice. If you see, check bleed OPEN indications on the icing panel. If not, then QRH.
What are the electrically powered icing components?
Heat probes (TAT probe), sensors (Pitot) and windows.
When does the electrical anti-icing heat begin?
When engine is started
What is the purpose of the pneumatic anti-ice with regards to Vortilons?
Exhaust for wing anti-ice air.
How does the anti-icing detector work?
Vibrates ultrasonic frequency. When ice adheres to it, frequency changes. When frequency changes, probe heats up and opens the anti-icing valves.
What happens to PACKS when anti-icing kicks on?
Left PACK shuts off at/below 24,600’
Where are the heating elements on the windows and does it heat the edges of the windows?
Elements are in between the inner/outer layers of the window and it does not heat the edges.
What do bonding straps on gear doors do?
Grounds doors to prevent static electricity from sealing doors shut.
What’s the purpose of the brushes on the main gear wells?
Aerodynamic sealing
How does the landing gears come up?
Hydraulic Downlock Release breaks the over-center locks and gear actuators overpower the big ass springs
How are nose gear doors held up?
Hydraulic pressure
How does the WOW switch logic work?
If all switches working - 3 of 4 must agree
If 3 are valid - 2 of 3 must agree
If 2 are valid - both must agree, else default signal
Default won’t let you raise gears if down.
What does the nose gear WOW do?
Feeds thrust reverser logic and steering control
What is the “+” sign on the overhead panel electric blocks?
Where backlighting wiring is connected
How does the nosewheel steering work?
Electrically commanded, hydraulically actuated
What type of oil system does the aircraft have?
Dry sump - pump and oil tanks are in separate locations
What pushes and pulls oil through the engine and how many?
1 push pump and 5 scavenge pumps
Where are the scavenge pumps located?
Fan section, Fwd, Center, Aft and AGB
How is oil cooled?
ACOC - Air Cooled Oil Cooler
FCOC - Fuel Cooled Oil Cooler
When does oil bypass the FCOC?
Fuel hot >93 deg C and differential oil pressure of 50 psi
What would cause the oil pressure to go high?
When bearings are cold, seal may not be complete. Allows pressure from center bearing to bypass the bearing and overpower the system past the Pressure Regulating Valve.
How does the aircraft deal with this high oil pressure?
System design allows the center SUMP to flow directly to the back of the PRV to address the issue and allow oil to continue.
How many oil pumps does each engine have?
1 pump unit with 1 push and 5 scavange pumps
How long after shutdown do you wait to check oil quantity?
5 mins
Where can you read the oxygen pressure for the tanks?
Oxygen service area and on the MFD Environmental page
What are the 3 oxygen mask position?
100% - 100% oxygen
Normal - mixes cabin air with 100%
Emergency - 100% delivered under pressure used for smoke to vent goggles.
What type is the passenger oxygen?
Chemically generated
When does the passenger oxygen mask drop when the switch is set to AUTO?
When cabin altitude reaches 14,000’
When does the fasten belts/no smoking sign automatically come one?
When the passenger masks drops
What’s the difference between the 9th and 14th stage bleed air?
Volume
Where are the engine bleed valves located?
Pylon
When does the Ram Air Door in the Air Cycle Machine close?
Airborne, when both PACKS go offline in an emergency or when you turn off the PACKS.