Power plant Flashcards
Which engines power of the EMB-145 LR
AE 3007 A1
Which turbine drives the compressor
Second stage high-pressure turbine
How many stages does the gas generator axial flow compressor have
14
Which turbine drives the fan
Third stage low pressure turbine
At which stages is the bleed air tapped
 ninth and 14th
Which engine and aircraft accessories are mounted on the accessory gearbox
One hydraulic pump
Two brushless electric generators
One air turbine starter
One permanent magnet alternator
One oil pump
One fuel pump metering unit
(HEAPOF)
What are the three sources of air available for an engine start?
APU
Engine bleed air
External air cart
Which unit controls the engine fuel, pumping, filtering, and metering functions
FPMU, under the authority of the FADEC
Where are compressor variable geometry (CVG) veins provided
For stages one through five of the compressor, and inlet guide veins
How are the compressor variable geometry (CVG) veins controlled
By fuel pressure from the FPMU, under input from the FADECS
What will the engine do in the absence of a torque motor signal to the fuel metering valve from either of the engines FADECs
It will shut down
Which part of the engine fuel system, both cools the engine oil and warms the fuel upstream of the FPMU filter
FCOC
Which page of the MFD shows the engines oil level
Takeoff page
Where is the engine oil pressure
On the EICAS
What is the capacity of each engines oil tank?
12 quarts
What is the recommended minimum oil level for Dispatch?
8 quarts
What minimum temperature must oil be at before N2 can be increased above 83%
40°c
At what level will the engine oil level indication turn Amber
When the oil level drops below 5 quarts
What does the acronym FADEC stand for?
Full authority digital electronic control
What is the primary electrical power source for engine control and the ignition system?
PMA
How many separate electrical windings does the PMA have?
Four:
2 three phase windings, and 2 single phase windings
What are the sources of N2 speed for the FADECs
Primary: one dual channel N2 sensor on the accessory gearbox
Secondary: from one of the three phase windings on the PMA
What are the sources of N1 speed for the FADECs
Two door channels sensors provide both primary and secondary speed signals, located at 11 and 12 o’clock on the left engine and 12 and 1 o’clock on the right engine
Above what N2 speed can the PMA provide sufficient power to drive the ignition system and FADEC
10% for the ignition system, and a minimum of 50% for the FADECs
How many igniters does each engine have, and where are they located?
2: at 12 and 6 o’clock positions
How many fuel nozzles are there on each engine?
16
How is the FADEC in command alternated
Automatically upon each engine start, and manually through use of the FADEC Control knob on the overhead panel
This knob becomes inoperative if held in any position for more than three seconds
While one FADEC controls the power plant, the other remains in standby mode, what does the standby FADEC do
It monitors all inputs, performs, all computations, and performs built-in test and fault detection. Output drivers for fuel flow and CVG Control powered off.
Why is each FADEC connected to one of the FADEC’s on the opposite engine
For thrust reverser interlock and automatic takeoff thrust control system
What are the thrust rating modes that can be selected for the A1 engines?
CLZ, CLB, CON, ALT/TO-1, TO-1
When will the FADECs command N1 Target?
When the thrust levers are positions in the detent
If a thrust reverser inadvertently deploys in flight, how will the FADECs react?
They will automatically select idle thrust
Where must the thrust levers be positioned to enable the engine to be shut down?
At idle
How are Target N1 and Requested N1 shown on the EICAS?
Target N1 is a blue T and the Requested N1 bug is a solid green triangle
Which thrust mode should be selected in flight with one engine inoperative?
CON
Which conditions must be met to select CON mode?
Pressure altitude must be greater than 300 ft above takeoff altitude with no gear down and locked, or pressure altitude greater than 1,700 ft above takeoff altitude
What conditions must be met to select CLB mode?
Pressure altitude must be greater than 500 ft above takeoff altitude with no gear down and locked and no one engine inoperative signal, or pressure altitude greater than 1,700 ft above takeoff altitude and no OEI signal
Under what conditions will the FADEC select T/O 1 mode?
-FADEC power up
-TO thrust rating button pressed with aircraft on the ground and TLA less than or equal to 50 degrees
-Gear down and locked below 15,000 ft
-When ATTCS is triggered during operation in ALT T/O-1 mode
-When thrust levers are advanced past the THRUST SET position
Where are the takeoff data setting controls located?
On the overhead panel and consist of a store button and a control knob
What information must be entered by the pilot for takeoff data?
- Takeoff mode
- Reference takeoff temperature
- Reference anti ice condition
Where is the takeoff data shown?
On the takeoff page on the MFD
What causes the MFD to show amber dashes where the takeoff data should be, and what should be done?
The takeoff data has not been accepted because Ref TO temp is outside acceptable limits
What does the caution message ENG REF A/I DISAG mean?
The anti-ice system condition does not agree with the ref anti-ice condition selected on the takeoff data
What is the purpose of the automatic takeoff thrust control system (ATTCS)?
To reschedule takeoff thrust to maximum takeoff thrust in an event an engine failure is detected during takeoff
What is the indication to the pilots that ATTCS is armed on takeoff?
A green ATTCS inscription shows below the thrust rating mode
Which aircraft system is used to activate the thrust reversers?
Hydraulic
How many locking systems does the thrust reverser system use to avoid inadvertent in flight deployment?
Three
How are the thrust reverser locking systems actuated?
The primary and secondary locks electronically commanded/controlled and hydraulically powered to unlock, the tertiary lock is electrically commanded/controlled and electrically powered to unlock
What are the main components of the lubrication system?
-Oil Tank
-Lube and scavenge pump
-Oil filter unit
-Air cooled oil cooler
-Fuel cooled oil cooler
What regulates the pressure supplied to the ATS and provides isolation pneumatic system following start completion?
Start control valve
What is the function of the FADEC engine control logic?
It controls engine fuel flow and the position of the CVGs. It also incorporates engine protection logic, prohibiting fuel flow commands that would result in exceeding rotor or temperature operating limits
During takeoff, the EICAS warning shows: ATTCS FAIL. What is the recall item?
Thrust lever…….. MAX
During takeoff and below V1, the EICAS message shows: E1(2) LOW N1
Rejected Takeoff Procedure…..ACCOMPLISH
What is the correct drill for a hot start?
START/STOP selector …… STOP
