Engine Flashcards
What engines are on the Phenom 300?
Pratt and Whitney PW535E
How are the engines controlled?
By a dual channel Full Authority Digital Electronic Control, (FADEC) system.
Each engine is controlled and monitored by _____ FADEC channels.
Two FADEC channels per engine.
One is active, and one is standby.
What supplies power to the FADEC?
A 28VDC airframe power is required to enable operation of the control system and to start the engine.
Once the engine is running, the FADEC takes its primary power from either the engine driven PMA or the onside DC Bus, whichever provides more power.
The 28VDC airframe power bus is available for
back-up supply purposes.
What are some of the functions of the FADEC? (7)
- During START, it accelerates the operating engine’s N2 to 72% to protect the gear box from damage.
- Ensures no LIMITS are exceeded on hot, hung or no start.
- Controls SLRB.
- Controls Automatic Thrust, (ATR).
- Provides WHSAIS envelope information to the AMS controller.
- Schedules FUEL FLOW during starting based on N2 speed and ambient conditions.
- Schedules fuel flow for normal operations.
- Controls the IGNITERS.
- Calculates an N1 SPEED SETTING corresponding to the TLA (Thrust Lever Angle)
- Controls Bleed Off Valve position.
- Controls engine shutdown.
During start, when are both igniters automatically energized?
One igniter for ground engine starting when TT0 is above 0°C.
Both igniters when TT0 is below 0°C.
Both igniters for in-flight engine starting.
How many lbs of thrust?
3360 lbs. thrust, up to 30 C.
During START, FADEC accelerates the operating engine’s N2 to ____ % to protect the gear box from damage.
72%
How does the FADEC assist an In-Flight Start?
- Automatically actuates both igniters during starting
- Disables the abort starting logic.
(In this case, the decision on whether to abort an unsuccessful start is at the pilot’s discretion.)
How is dry motoring performed?
- ENG IGNITION switch to OFF
2. setting the ENG START/STOP knob to START
What is the purpose of the Permanent Magnetic Alternator, (PMA)?
The PMA is the primary source of AC power to both channels of the FADEC when the engine is running above idle.
Below this speed, the primary source of AC power to the FADEC is the airframe 28VDC power, which is used during engine starting and as a backup source for
the PMA.
What is the purpose of the ATR?
The ATR, controlled by the FADEC, automatically provides maximum engine thrust (TO RSV or GA RSV).
What will happen if the START/STOP knob is moved to STOP and the TLA is not at idle?
The FADEC will disregard the STOP selection and not shut down the engine.
Under normal operating conditions what color are the engine instruments pointers and digits?
Green
What does an “E1/2 OIL IMP BYP” CAS message indicate?
There is an impending blockage of an oil filter.