Engine Flashcards

1
Q

What engines are on the Phenom 300?

A

Pratt and Whitney PW535E

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2
Q

How are the engines controlled?

A

By a dual channel Full Authority Digital Electronic Control, (FADEC) system.

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3
Q

Each engine is controlled and monitored by _____ FADEC channels.

A

Two FADEC channels per engine.

One is active, and one is standby.

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4
Q

What supplies power to the FADEC?

A

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.

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5
Q

What are some of the functions of the FADEC? (7)

A
  • 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.
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6
Q

During start, when are both igniters automatically energized?

A

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.

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7
Q

How many lbs of thrust?

A

3360 lbs. thrust, up to 30 C.

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8
Q

During START, FADEC accelerates the operating engine’s N2 to ____ % to protect the gear box from damage.

A

72%

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9
Q

How does the FADEC assist an In-Flight Start?

A
  1. Automatically actuates both igniters during starting
  2. Disables the abort starting logic.

(In this case, the decision on whether to abort an unsuccessful start is at the pilot’s discretion.)

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10
Q

How is dry motoring performed?

A
  1. ENG IGNITION switch to OFF

2. setting the ENG START/STOP knob to START

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11
Q

What is the purpose of the Permanent Magnetic Alternator, (PMA)?

A

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.

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12
Q

What is the purpose of the ATR?

A

The ATR, controlled by the FADEC, automatically provides maximum engine thrust (TO RSV or GA RSV).

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13
Q

What will happen if the START/STOP knob is moved to STOP and the TLA is not at idle?

A

The FADEC will disregard the STOP selection and not shut down the engine.

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14
Q

Under normal operating conditions what color are the engine instruments pointers and digits?

A

Green

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15
Q

What does an “E1/2 OIL IMP BYP” CAS message indicate?

A

There is an impending blockage of an oil filter.

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16
Q

How does the FADEC assist an In-Flight Start?

A
  1. Automatically actuates both igniters during starting
  2. Disables the abort starting logic.

(In this case, the decision on whether to abort an unsuccessful start is at the pilot’s discretion.)

17
Q

How does the FADEC assist for an Auto Relight?

A

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.)

18
Q

How is dry motoring performed?

A
  1. ENG IGNITION switch to OFF

2. setting the ENG START/STOP knob to START

19
Q

What is the purpose of the Permanent Magnetic Alternator, (PMA)?

A

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.

20
Q

What is the purpose of the ATR? When is it activated? (3)

A

The ATR, controlled by the FADEC, automatically provides maximum engine thrust (TO RSV or GA RSV) whenever:

  1. ATR armed
  2. Thrust levers are at least at the TO/GA position

and one of following conditions occurs

A. ‣ Difference of N1 values is greater than 20% between both engines (one engine fails);
B. ‣ Loss of communication between both engines.

21
Q

When is ATR activated?

A
  1. ATR armed
  2. Thrust levers are at least at the TO/GA position

and one of following conditions occurs

‣ Difference of N1 values is greater than 20% between both engines (one engine fails);
‣ Loss of communication between both engines.

22
Q

Minimum oil temperature for starting and idle only?

A

-40C

23
Q

Minimum oil temperature for power above idle?

A

10C

24
Q

Whats inside the AGB? (5)

A
Starter Gen
Fuel Pump (Fuel management unit)
Oil Pump
Hydraulic Pump 
The AGB itself is the oil tank.
25
Q

Must idle engines for ______ after touchdown.

A

Two minutes minimum.

26
Q

FADEC protects against

3

A
  1. No light off, No ITT rise within 10 seconds
  2. Hung Start, engine does not reach ground idle parameters in 60 seconds. (Minimum N2 55.1%)
  3. Hot Start, temp just before red line
27
Q

FADEC does not protect against:

2 big ones

A

No oil pressure.

No fan speed.

28
Q

Each ignition system has how many igniters?

A

two

29
Q

When are both igniters energized?

A

Start below 0C and engine failure in flight.

30
Q

What is the position of the following valves when ATR is activated?

  • PRSOV - failed engine
  • PRSOV - operative engine
  • FCSOV (ECS) 1:
  • FCSOV (ECS) 2:
A
  • PRSOV - failed engine- Closed
  • PRSOV - operative engine– PRSOV - failed engine (Open if Wing/Stab heat is ON).
  • FCSOV (ECS) 1: - Closed
  • FCSOV (ECS) 2: - Closed
31
Q

What is the function of the active FADEC channel?

A

Actively controls all engine functions.

32
Q

What is the function of the standby FADEC channel?

A

Monitors all engine functions and assumes control with failure of active channel.

33
Q

What determines the active FADEC channel?

A

The active channel alternates between engine cycles.

34
Q

What is the recommended time for checking oil quantity following shutdown?

A

10-20 minutes