Engine Flashcards
What type of engine is on the E175
GE CF34-8E5
The engine produces maximum power from _____ lbs up to _______ lbs on the reserve mode (RSV) at ISA conditions
13,800 lbs up to 14,200 lbs
The five sections of the engine are:
Cold section Accessory gearbox (AGB) Combustion liner and stage 1 nozzle assembly High pressure turbine (HPT) Low pressure turbine (LPT)
A single low pressure fan is driven by a _____ stage low pressure turbine.
This is represented by what on the EICAS?
four stage
N1
A ___ stage axial flow compressor with variable geometry inlet guide vanes and stator vanes are driven by a ___ stage high pressure turbine.
This is represented by what on the EICAS?
10 stage driven by a 2 stage
N2
What is mounted on the AGB?
Electric alternator (IDG) Hydraulic pump
The ITT is measuring the temperature in what part of th engine?
Around the low pressure turbine
Fuel Flow is measured where in the engine?
In the fuel control unit
How many fuel injectors are installed on each engine?
18
The fuel control is managed by the _____
FADEC
The max fuel schedule limits the fuel into the engine to protect against: (3)
Engine speed
Temperature
Compressor discharge pressure (CDP)
(T/F) The FADEC will switch from channel A to B and from B to A after every successful engine start, assuming normal operation of the systems
True
The main purpose of the oil in the engine is ___
Lubricate the engine bearings
Lubricate the AGB bearings
The FADEC ignites ___ starter(s) for ground starts and ___ starter(s) for inflight engine starts
1 on the ground, both in flight
(T/F) When the ignition is placed into OVRD all 4 igniters are activated.
True
Igniters 1B and 2B are connected to _____
SPDA2
The FADEC will deactivate the igniters automatically under what conditions?
- Engine shutdown
- ## Ignition knob set to OFF during dry motoring on ground
(T/F) If you select the ignition to OFF in flight the igniters will shutoff and the engine will shutdown
False. The FADEC disregards an OFF setting in flight
(T/F) If a flameout is detected the FADEC will automatically start both igniters and a FAIL message will appear in N1
True
During an engine start the FADEC controls: (3)
While the aircraft controls: (4)
FADEC:
- Fuel flow
- Starter command
- Ignition command
Aircraft controls:
- Starter control valve
- Hydraulic engine driven pump
- Switches power to ignition exciters
- Manages bleed system interface
FADEC deactivates the starter control valve (SCV) at approximately ___% N2 and turns the ignition off
~50% N2
The FADEC commands the ignition to ON at approximately ___% N2
~7% N2
The fuel metering valve opens at approximately ___% N2
~20% N2
In an air start the fuel metering valve will automatically open if the FADEC hasn’t detected the N2 to reach ___% after ___ seconds
20% N2 after 15 seconds
(T/F) The FADEC has no protection for hot starts, hung starts or failure to light-off for in-flight engine starts.
True
During an in-flight engine start, if no light off is detected within ___ sec. after fuel flow is started, the start should be manually aborted
30 seconds
The FADEC start protection logic provides protection from:
It only provides this with a ________ detection
- Automatic hot start protection
- Hung start protection
- No light-off protection
It only protects when it detects weight on wheels
The hot start protection will terminate the start when ITT rises above ___C during a ground start. It does this by ______ and ______
815C
Closing the fuel metering valve and shutting off the ignition
If the N2 drops below ____% during an auto relight after a flameout, the start lever should be moved to OFF to abort the automatic restart attempt
7%
During ground operations, auto relight attempts are terminated and fuel is shut off if the engine RPM falls blow ___% N2
52%
(T/F) With an inoperative engine, the inoperative engines thrust reverse can’t be selected on landing
True
Automatic takeoff thrust control system(ATTCS) provides engine thrust reserve (RSV) in the event of: (3)
Engine failure during takeoff
Go-around
Windshear warning detection
Pulling the emergency shutdown lever stops:
Fuel flow
Hydraulic flow
Pneumatic air flow
The N1 Wing Anti Ice bug (WAI) indicates the ____ (min/max) value when the wing anti ice is on and the aircraft is in the ______ phase
Minimum required in the final approach phase
(T/F) The maximum N1 value will always be lower than the N1 redline
True
REV in red with an EICAS message ENG X REV DEPLOYED means what?
A reverser deployed inadvertently in air
For the LP Vibration indicator the
Green range is from ____ to ____
Amber from ____ to ____
Green from 0 to 3.9
Amber from 4 to 5
(T/F) It may be normal to get a high vibration reading with all other engine parameters indicating normal operation
True
