UPGRADE - Oral Flashcards
Where does the DC service switch get power from?
Normally powered by the TRU 2 through the DC BUS 2
Why do we not leave the airplane in the service configuration using the DC service switch?
It will drain the battery
With the battery master switch on (No AC power established) which screens come online? What is the limitation?
EICAS Display 1 and 2, 5 minutes (due to the display fans not being on)
What does the AVAIL Illumination on the AC switchlight indicate?
Proper PHASE, VOLTAGE, FREQUENCY
What does the FAULT illumination on the IDG switchlight indicate?
High oil temperature or Low oil pressure in the IDG
What does the DISC illumination of the IDG switchlight indicate?
IDG has been disconnected
How can the IDG be disconnected?
Either manually or automatically
Explain the auto disconnect of the IDG?
when electrical disconnect fails, mechanical disconnect occurs when an over temperature or by shearing the IDG drive shaft with an over torque condition
What does the illumination of the AC ESS XFER switchlight indicate?
AC ESS bus is not powered by AC Bus 1
How many generators are installed on the airplane?
4
- GEN 1
- GEN 2
- APU (Generator)
- ADG (Generator)
What are the main generators rated at?
2- Engine driven Integrated Drive Generators
40 KVA, 115 V (AC), 400 HZ
1- APU generator
40 KVA, 115 V (AC), 400 HZ
What is the ADG rated at?
15 KVA, 115 V (AC), 400 HZ
What would cause the ADG to auto deploy in flight?
With complete loss the AC system (AC Bus 1 and 2)
If the ADG is deployed in flight, what does it power?
AC ESS bus
Hydraulic 3B pump
Slats/Flaps
STAB TRIM CH 2
Taxiing on the left engine (right engine off) flaps up, APU running (first flight of the day) switches AUTO/ON, which hydraulic pumps are running? How much braking is available?
Only system 1 and 3 are running, we don’t have the engine running to run 2A, and flaps are up which doesn’t allow the running of of pump 2B.
Pumps running, 1A, 3A
During normal takeoffs and landings which hydraulic pumps are operating (AUTO/ON)?
1A, 1B, 2A, 2B, 3A, 3B
If there is a failure of an A pump in flight, will a B pump automatically come online? AUTO/ON?
No, 1B and 2B do NOT automatically start after an engine failure or EDP failure.
Manual mode must be used selected, ON
How many hydraulic accumulators do we have? Purpose? The biggest accumulator?
5 accumulators
- one for each hydraulic system (3)
- one for each brake system (2)
Purpose: Accumulators are charged with dry nitrogen. They are used to store hydraulic pressure and dampen out pressure surges within the system
Biggest System: Is hydraulic system 3, they have the most demand required
How is Hydraulic system 1 and 2 cooled? Explain
Some hydraulic fluid is used to cool the EDP components. So, this fluid is cooled by the air/heat exchanger.
Ram air scoop directs cool air across the air/heat exchanger to cool the hydraulic fluid.
On ground, an electric fan located inside the air/heat exchanger draws cool air from the ram air scoop for cooling
How does Hydraulic system 3 get cooling?
Through natural convection and radiation dissipation of heat
How many ways can we transfer fuel?
3 ways
- Auto XFLOW
- Manual XFLOW
- Gravity XFLOW
When do the fuel boost pumps operate?
- When selected in (armed)
- Used during engine start, when armed
- They are activated when the FSC senses a low pressure in the engine fuel feed line and the pump will turn on, with one pump on the other pump ALWAYS turns on
When will the fuel system auto transfer fuel?
The FSC will sense an imbalance between tanks of 200 lbs and will activate the bi-directional pump to flow fuel from the higher quantity tank.
- The computer will continue to pump fuel until the tanks are balanced plus 50 lbs on the low side
What does the illumination of the FAIL XFLOW switchlights indicate?
Auto cross flow has failed, (The failure of the bi-directional pump)
What happens if we move the WING A/I CROSS BLEED switch from normal position FROM LEFT or FROM RIGHT?
Cross bleed switch closes the opposite anti-ice valve and opens the cross bleed valve, allowing single source anti-icing
If you select the BLEED VALVES rotary knob from AUTO to CLSD which valves will close?
Bleed Valves, so it allows APU to be used as a bleed source
If you want to use the APU as your primary bleed source, how would you do that?
- From right to left?
First Flight of the day. Before you start the APU what must be done?
Must do the FIRE SYSTEM TEST!
- Needs to make sure the loops are tested off the battery
What is the minimum battery voltage to start the APU? Where would you verify that?
22 Volts, on both batteries, Verify that on the ELECTRICAL SYNOPTICS page
What is the APU start limitation?
No more than 3 starts allowed in 1 hour, must have 2 minutes in between starts
What are the APU priorities?
Engine Starting, Air Conditioning, Pressurization
What is the top altitude we can use the APU for electrical loading?
41,000 feet
What is the top altitude we can start the APU?
37,000 feet
What is the top altitude for bleed air extraction?
25,000 feet
Where is the APU fuel supplied from?
Left collector tank
During a normal engine start, the starter should cutout at? If it does not?
50%, if it does not follow memory item for “ENGINE STARTER CUTOUT”
For a Normal engine start, what is the starter limitations for attempts 1-2, 3-5?
1-2: 90 seconds ON, 10 Seconds OFF
3-5: 90 Seconds ON, 5 Minutes OFF
When are we required to select CONT IGNITION? When does it automatically come on?
Required when:
- Takeoff and Landing on Contaminated runways
- Flight through moderate or heavy precipitation
- Flight through moderate or greater turbulence
- Flight in vicinity of thunderstorms
Comes on automatically:
- When approaching a stall (stick shaker sends a signal to the stall protection computer and signals FADEC to energize continuous ignition)
- FLAMEOUT PROTECTION
What is the top altitude we can start an engine?
Windmilling/Starter assisted
21,000 feet
What is the EPC for a HOT START?
Affected Thrust Lever - shutoff
Dry motor - Until ITT reduces below 120 degrees C or starter time limit, whichever occurs first
Affected ENG Stop Switch - Stop
How is pressurization normally set?
Landing field elevation
What does the EMER DEPRESS switchlight do?
Outflow valve fully opens to depressurize the aircraft.
- At cruise the cabin depressurizes to 14,500 feet (+/-500 feet)
What does the illumination of the FAULT on the PRESS CONT switchlight indicate?
That both pressure controllers have failed
In the auto mode, what does the illumination of the FAULT on a PACK switchlight indicated?
Over pressure or Over temp
In manual mode what will usually trigger the FAULT on a PACK switchlight?
Over temp
What is a PACK?
Pressurization Air Conditioning Kit, Left pack supplies cockpit, Right pack supplies Cabin through the mixing manifold
Single Pack can supply both, but at a reduced flow via the mixing manifold
Steps (sequence) for a normal engine start
- ISOL valve opens
- Start Valve opens (associated engine) to allow pressure from bleed air manifold to engage Air Turbine Starter (ATS)
- White light illuminates the associated START switchlight
- L or R ENGINE START display message is on EICAS >50% N2
- Start Valve closes and ATS disengages
- white switchlight extinguishes
- status message is removed
- if the starter fails to cutout at 50% N2, a NO STRTR CUTOUT caution message is displayed
What is the limitation for the Single Pack Operation?
FL 250
What is the limitation on the RAM AIR switchlight? When would we use it?
RAM AIR valve will be selected open for unpressurized flight, limited to 15,000 feet
What are the 3 different positions of the CARGO toggle, and what do the different positions do?
Off- Closes intake and exhaust SOV’s to seal aft cargo bay enclosure
AIR - SOVs open to allow recirculated air to ventilate aft cargo bay
COND AIR - will provide automatic temperature control of aft cargo bay utilizing electric heater
What does the illumination of the ICE switchlight indicate?
When either one or both of the ice detector units detect icing conditions exist and both cowl and wing anti-ice selectors are off
What does the illumination of the ICE switchlight indicate?
When either one or both of the ice detector units detect icing conditions exist and both cowl and wing anti-ice selectors are off
What is the difference between ICE caution message and ICE advisory message?
Both wing and cowl anti-ice must be selected on and wing leading edge is greater than 39 degrees c for ICE caution to cancel and ICE advisory to be on
What is the definition of icing conditions on the ground? In the air?
On ground: when OAT is at or below +10 degrees C with visible moisture present
In Flight: When OAT is at or below +10 degrees C with visible moisture present, except when SAT is at or below -40 degrees C
During taxi operations when are you required to turn on cowl anti-ice? The Wing Anti-ice?
Taxi operations, when on ground is icing cowls must come on during contaminated runways, taxiways, wing anti-ice right before takeoff, if type II, III, IV fluid was applied, or if OAT is at or below 5 degrees C with visible moisture present on contaminated taxiways, ramps
In flight, wing anti-ice will come on with cowls, otherwise below 230 knots as a precaution wings will come on (without the ICE caution message)
When the WINDSHIELD HEAT switches are in low, what temp are the windshields heated?
All 4 panels heated to 24 degrees C
When the WINDSHIELD HEAT switches are on high, what temp the windshields heated? Side windows?
Windshields heated to 41 degrees C, side windows heated to 24 degrees C
When must we leave the windshield heat off?
ISA + 35 degrees C
On the ground, with the probe switches off, what is heated and what is not?
Probe and standby pitot probe - heated half power
Static Ports and AOA - Not heated
If we have AC power and probe switch ON
TAT, Pitot Base - OFF
AOA, Pitot static - ON
Pitot Head - half heat
What would happen if we forget to turn the probe switches on and we takeoff?
Static Ports and AOA - not powered
Pitot head and base and standby pitot probe - heated half power
