ORAL* E145 Powerplant Flashcards
Engine Model
AE3007A1P
Max Thrust?
8169 lbs
N1 is?
Single stage Fan, 3 stage low pressure turbine
N2 is?
14 stage compressor with inlet guide vanes and a two stage high pressure turbine
FADECS
2 per engine, one in use at a time
Variable Geometry Vanes are
on stages 1-5 and the inlet guide vanes
What moves Compressor Guide Vanes
Fuel pressure from FPMU
Bleed from which stages?
9 and 14
What items are or accessory gear box?
Fuel Pump Hydraulic Pump Oil Pump Alternator Generators Starter
Fuel from FPMU goes where?
Nozzles in combustion chamber and the CVG’s
The FCOC is?
Fuel cooled oil cooler
Bypass of FCOC occurs?
When oil temp is more than 93.3C or pressure differential is greater than 50 psi
How many fuel nozzles each engine?
16
How is oil cooled?
Air, ACOC
and Fuel FCOC
Oil capacity
12 quarts
Where is oil level shown?
T/O page on MFD
Oil Caution level?
5 quarts and below
The oil pump has how many pressure and scavenge units?
6….1 pressure, 5 scavenge
Oil is scavenged from how many engine sumps?
4….fan sump, front sump, center sump, aft sump. It’s also sumped from the AGB
What does the PMA Alternator power?
ignition and FADEC
What powers FADEC before alternator?
DC system
Do igniters have any other power source besides PMA?
No
PMA provides igniters power at?
10% N2 and above
PMA powers FADEC at what speed?
50% N2 and above
In the event of an electrical emergency, what does the PMA also power?
The thrust rating buttons
How many igniters on each engine?
2
Each igniter controlled by a single
FADEC
IGNITION ON function
Both igniters fired by it’s FADEC
IGNITION AUTO function
Only one FADEC controls ignition. Shuts down ignition after start, and only one exciter used. Auto relight will activate ignition system
How do you dry motor?
Ignition Selector Knob in OFF, and START
What can supply air for start
APU, Huffer Cart, Or Cross Bleed from Running Engine
Start Control Valve….how can it be controlled if it fails?
Manual Override at the engine
What does E1 ATS SOV OPN Caution message mean?
Start Control Valve didn’t close…it should close at 53% N2 + 10 seconds
When is Starter cutoff? Start relay shut off by FADEC
56.4 % N2
FCOC temp/pressure sensor may not display proper Oil pressure for how long after start?
It MAY display approx 90 psi for 2 minutes after which it will jump to actual pressure
When is OIL LOW PRESS displayed?
Below 34 psi with engine running or if pressure switch has failed closed without engine running
What does FUEL LOW TEMP mean?
Fuel temp at the engine is less than 5C
What engine protections does FADEC provide?
Overspeed, always, and temp limits after start
Which FADEC is in control
It alternates with each start
How do you know which FADEC channel is in control
It’s on the EICAS
Can you manually change FADEC channels?
Yes…ALTN on FADEC selector knob
How does FADEC do N1 Target calculations?
Pressure altitude and Mach from the ADCs, temp references, Anti Ice condition and takeoff mode
On EICAS…what does N1 Target look like?
Blue T on N1 gauge
On Eicas what does N1 request look like
Green bug on N1 gauge
Does flight idle change with Anti Ice on?
Yes…adjusted to provide enough bleed
In flight with anti ice on when is flight idle not rescheduled?
inhibited below 15k with gear down and locked
How fast must engine be able to accelerate to 100% from idle in flight?
8 seconds or less at or below 9500 feet
in flight, FADEC will try to relight until?
engine spools down to below 53% N2
IN flight, which ignition systems are used during restarts?
Both
When will FADEC switch channels automatically?
If one fails or cannot control the engine
What does RESET on FADEC knob do?
Clears previous faults
If both FADEC’s fail will engine run?
No
What are the thrust modes of A1P Engines?
Alt T/O 1, T/O, Max Continuous (CON) CLB, CRZ
In flex…(Alt T/O) Engine fails…what does good engine schedule
T/O-1
How do you select T/O-1 in flight
Press T/O thrust rating button at or above field elevation +1700 feet after takeoff
When is T/O selected auto in flight?
Gear down and locked below 15k
If T/O Mode is selected and engine fails what thrust on remaining engine is programmed? Or when thrust leveret pushed past Thrust set detent
T/O RSV
When is ATTCS armed?
When both engines are ATTCS capable (ALT T/O-1 or T/O) and thrust levers are advanced beyond 45 degrees
When is ATTCS triggered
Generally…When the other engine fails…or it detects a condition be it thrust lever reduction on opposite side and so on
When is ATTCS disarmed?
When ATTCS is triggered, or thrust levers reduced or there’s no T/O mode selected
What has to be entered to calculate N1 Target?
Temp, T/O mode, and whether Anti ice is on
When entering temp on T/O page of MFD…how close does it have to be to synthesized temp?
10 degrees C or you get an error
During ground start when does FADEC activate ignition?
14 % N2
During ground start when is fuel added
28.5 % N2
If Thrust is out of idle and ignition switch turn to off will engine shut down?
No.
After start abort…how many seconds must you dry motor?
30 seconds
Amber REV on EICAS…what does it mean?
Reverser in transit
Green REV on EICAS?
Reverser open
How many locks on reversers?
3 each…two electric/hydraulic, and one electric/electric
Normal ops, reversers stowed..which lock is active
Just one..the primary. If it fails, secondary activates, followed by tertiary
What conditions for REVERSERS?
WOW, faster than 25 knots if main only, or WOW all wheels
While REVERSERS unlocked or in motion, what if you move thrust forward?
IDLE Thrust commanded by FADEC
Can you reverse with one engine ions?
Yes, if inop is in idle
MAX N1?
100%
MAX N2?
102.4%
Max Start ITT?
800 C
Max Takeoff ITT?
948 C for 5 minutes
Max continuous ITT?
901 C
Minimum Oil Pressure?
34 psi below 88% 50psi above
Max Oil Pressure?
95 psi. Higher okay during cold starts/cold oil. Idle until warm and psi less than 95
Minimum Oil temp for start?
-40 C
Max fuel temp?
52 C
Max n1 vibe?
1.1…can be amber during TOGA or 10 seconds other flight phases
Starter Limits?
1-4...1 minute on, 1 minute off After 4...1 minute on, 5 off Dry motor 5 on 5 off In flight...5 minutes on, no cool down 11,15,55,5
Idle warm up?
Cold - 4 minutes, Warm, 2 minutes
When is engine cold
Shut down for 90 minutes
When can 83% thrust be exceeded after start
Oil temp > 40
Or pressure less than 83 psi
After landing shutdown limit
1 minute at idle
Starting sequence
RUN for at least 2 seconds before START
When does ignition shut off in start
57% N2 ? (EICAS MSG goes away at 57%)
How long between APU start and engine shutdown
1 minute Do not shut down engine while APU is being started
What engine do you need for taxi?
2….Steering is on DC Bus 2
If you have engine shutdown and need GPU, what is limit
N2 at 0%….You should connect prior to shutdown if APU is unavailable
Air temp below 10C…Starting engine which position on switch?
ON…for both igniters
Cross Bleed start…What RPM on running engine?
> 80%
Min oil level for takeoff (recommended)
8 its
