Collection of past Orals Flashcards
What happens if a power generating source fails?
Bus ties automatically connect to provide no system degradation
Can a single pack provide adequate temp control and pressurization?
Yes: up to FL310
What monitors and controls the IDG’s?
Each has a generator control unit (GCU)
Where are the Primary Ejector Pumps located?
In the collector tanks
How many different ways can fuel be supplied to the APU?
- DC Fuel Pump (tank 2)
- AC Fuel Pump (tank 2)
- Tank 2 ejector pump
- Tank 1 ejector pump via X-Feed
- Tank 1 AC Fuel Pump via X-Feed
Will the APU automatically shutdown if speed and acceleration rate isn’t reached in the starting cycle time?
Yes
Explain what happens in Hyd System 2 that allows us to safely conduct a single engine taxi with only Engine 1 operating?
If in “AUTO” (and only engine 1 is operating) upon releasing the parking brake ACMP 2 will activate to provide hyd power for nose wheel steering and the inboard brakes.
What happens if smoke is detected in the recirculation bay?
- Both recirc fans deactivate
- Cargo recirc fan deactivates
- Cargo Outflow Valve closes
What is min. airspeed for the RAT?
What happens if speed drops below that value?
130kts or else Load shedding occurs below this speed
If “OFF” is selected on the ground at what point will the anti-ice system become automatic?
1700 ft. AGL
or
2 minutes after takeoff (whichever happens first)
What is an SPDA?
An electrical load-mgmt unit powered by the ICC’s that distributes electrical loads to aircraft systems according to distribution logic.
What sources are used for aircraft anti-icing and de-icing?
- Bleed air heat
- Electric heat
What uses electric heat for ice protection?
- Pitot-static system
- Windshields
- Water lines
- Pressurization static port
What uses bleed air for ice protection?
Engine lips
3 outboard slats
What airplane systems have fire detection and protection?
- Engines
- APU
- Cargo Compartments
- Lavatories
What model PowerPlant is on our Ejet?
General Electric CF34-8E5, High-Bypass, Dual Rotor turbofan
Describe N2 spool?
10-stage compressor (gas generator)
2-stage HP turbine
What is the purpose of the scavenge pumps?
Maintains fuel level in the collector box
When will the “FUEL 1(2) LO LEVEL” EICAS be presented?
660 lb. of fuel remaining in the associated tank
What is the purpose of the DC GPU receptacle?
For APU start when BATT 2 is either:
Less than 22.5 VDC
or
Colder than -20 degrees
Describe the Engine and APU fire detection system?
Engine: 8 pneumatic fire detectors (2 loops) per engine
APU: 2 pneumatic fire detectors (2 loops)
What does the RAT power?
AC ESS BUSSES
Which powers:
- AC STBY BUS
- TRU ESS: directly powering DC ESS BUS 3 (which powers DC ESS BUS 1 and 2 through ETC 1 and 2)
What components power the DC system?
2 NiCad batteries
3 Transformer Rectifier Units (TRU)
DC GPU receptacle
What components are protected from Ice and Rain?
- Engine inlets
- Wing leading edge
- Smart probes
- Windshields
- Water and Waste drain systems