Embraer 505 Question Bank Flashcards
(155 cards)
What engines are on the Phenom 300?
How many lbs of thrust?
Pratt & Whitney PW535E; 3360 lbs of thrust
How are the engines controlled?
By a dual channel Full Authority Digital Electronic Control (FADEC) system. Each engine is controlled and monitored by two FADEC channels. When one channel is in control, the other is in standby mode.
What supplies power to the FADEC?
A 28VDC airframe power is required to enable operations of the control system and power to start the engine. Once the engine is running, the FADEC takes its primary power from either the engine PMA or the 28VDC airframe power, 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?
- During Battery 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 Automatic Thrust, (ATR).
- Provides WHSAIS envelope information to the AMS controller.
- Schedules fuel flow during starting based on N2 speed and ambient conditions. * Controls the igniters.
- Calculates an N1 speed setting corresponding to the Thrust Lever Angle, (TLA) position selected, and compensates this setting for ambient temperatures and pressures, aircraft bleed off-takeoffs and operating modes. The FADEC then governs the engine to this N1 value.
During start, when are both igniters automatically energized?
The FADEC energizes one igniter for ground engine starting when
TT0 is above 0°C and both igniters when TT0 is below 0°C or for in-flight engine starting.
How does the FADEC assist an In-Flight Start?
FADEC automatically actuates both igniters during starting and disables the abort starting logic. In this case, the decision on whether to abort an unsuccessful start is at the pilot’s discretion.
How does the FADEC assist for an Auto Relight?
The FADEC continuously monitors the engine parameters and automatically turns on both igniters and schedules the relight fuel flow in case an engine flameout is detected, assuming the ENG START/STOP knob is out of the STOP position.
How is dry motoring performed?
By setting the ENG IGNITION switch to OFF, while the engine is in shutdown state, and by 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) whenever it is armed, and one of following conditions occurs:
TLA at TOGA
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.
How many batteries power the airplane?
Two.
What type are the batteries?
Lead-Acid.
Where are the batteries located?
1 in the nose; #2 behind rt. wing root.
How many volts and amps for each battery?
24VDC; Batt 1 34 A, Batt 2 48A
Which battery provides electrical power for engine starting?
2 battery
What is the minimum voltage for starting? Charging?
24V and 27V
How many generators? Volts? Amps?
Two. 28VDC. 400A.
What are the generator loads?
Ground: 330A
Flight: 390A
What is the minimum battery temperature for normal operation?
-10C
What function in the electrical system allows the engine to start without causing surges in the Avionics?
Quiet Start Contactor
If a single generator fails in-flight, what happens?
Both SHED BUSES lose power.