Sovereign Powerplant Flashcards
What engines are on the Sovereign?
PW306C’s
What is FADEC?
Full Authority Digital Electronic Control
Does FADEC control the N1 or N2?
N1 above idle
N2 during Start and at idle
Where does FADEC get its power?
Dual channel Permanent Magnet Alternator when the engine N2 RPM is above 25%, and
28 volt DC from its respective START BUS as a backup to the PMA and during Engine Start <25% N2
What are the Probes at the 2 o’clock position in the Engine Inlet?
P1/T1 (RAT) Probes
Sends temperature and pressure information to respective FADEC
If no N1, at what RPM should you abort the start?
40% N2
What type of valve are the BLEED valves?
Solenoid type (NO)
What happens if the Controlling FADEC A or B Channel faults?
It will automatically switch to the other Channel
An amber ENGINE CONTROL FAULT L/R will appear
Where is ITT measure?
T4.5
Why are the STBY instruments considered more accurate?
They’re a direct measurement via the FADEC
When are the TAT probes heated?
With activation of the ENG/STAB anti-ice
What are the components of the FADEC?
2 EEC’s and 1 EDU
What is the purpose of the Engine Diagnostic Unit?
Records Engine Data and FADEC faults
What power the EDU?
FADEC
Can we SYNC N2?
N1 ONLY
Name a few benefits of FADEC?
- Automatic Power Settings (TO,MCT,CRZ,GND/FLT IDLE,ANTI-ICE)
- Overspeed Protection
- Ignition Control
- Engine SYNC
- BOV Operation
What’s the purpose of GND/FLT IDLE?
GND IDLE - Ease of taxi / Brake wear
FLT IDLE - Reduce Engines time to Accelerate in the event of a rejected landing or GA and prevents rollback and possible flameout at altitude
How long does FLT IDLE remain after landing? Why?
8 seconds
For potential GA
What is GND IDLE?
57 -59% N2
What happens if an Engine stays in GND IDLE after takeoff?
Amber GROUND IDLE message on EICAS
Which Engine is the SYNC master?
LEFT
What does the CYAN target N1 indicate?
The non-controlling FADEC Channel has confirmed the controlling Channels power setting
What EICAS message will be generated on the ground with an Amber N1 target?
CYAN ENGINE DISPATCH LIMIT
What does an Amber ENGINE FAILED message on EICAS indicated?
The FADEC has shutdown the engine automatically
What does a CYAN ENGINE SHUTDOWN message on EICAS indicate? When will it extinguish?
A crew member has shutdown the engine
and will extinguish at IDLE RPM on the subsequent engine start
When are the engines being SYNC’d?
Between IDLE and MCT
What’s the purpose of the EVENT marker?
To record on the EDU any significant events that may have occurred with the operation of the engines (Records engine data 4 minutes prior to 1 minute after pressing the button)
What are some reasons to ABORT an engine start?
- No ITT rise within 15 seconds
- No N1 by 40% N2
- No GND IDLE by 90 seconds after initial ITT rise
When will the FADEC abort the start automatically?
- No ITT within 15 seconds
- ITT above the nominal start trend by 100 degrees C
What’s the maximum altitude for an inflight start?
FL300
Will the FADEC automatically abort an engine start if it recognizes NO N1 by 40%N2?
NO
What is the pilot action if the ENGINE START button remains illuminated after 44% N2?
Press the DISENGAGE button
What’s the maximum battery amps prior to the second engine start?
100
What does the green IGN indicate?
There is power to at least 1 exciter box on the respective engine
Where do the igniters get there power?
EMER BUS
Why should the throttles be in cutoff for 30 seconds prior to turning the BATTERY buttons OFF?
Allow time for engine diagnostic data to be downloaded to EDU’s
How is engine OIL PRESS sensed?
- Via a pressure Transducer to the gage
- Via an independent pressure Switch for the CAS message
What percent of engine thrust is bypass air?
75%
Is FADEC abort logic active on an inflight start?
NO
Why is it important to set the Throttles to cutoff after a flameout?
Reset FADEC logic
What’s the minimum N2 for a windmill start?
9%
An Amber OIL LEVEL LOW message on EICAS is illuminated on your preflight, what’s should be your first reaction?
How long has the airplane been sitting and is the airplane level
What’s the minimum KIAS for a windmill start?
200
What should you know if you see a CYAN OIL LEVEL LOW L/R message on EICAS during your preflight?
Indicates a possible fault in the indicating system (dry motoring may correct the problem)
What provides power to the FADEC during start?
START BUS up to 25% N2 and the PMA after that
Which FADEC Channel computes and positions the N1 indicator on the EICAS?
The non-controlling channel
