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Republic E170 > Engine > Flashcards

Engine Flashcards

1
Q

How does fuel get from the fuel tanks to the engine

A

low pressure pump - returns to fuel tank as motive flow
high pressure pump - flows through fuel/oil heat exchanger to fuel filter then Fuel Metering Unit (FMU) then through high pressure pump before returning to FMU

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2
Q

Describe the FMU

A

controlled by the FADEC, meters and distributes the proper amount of fuel for combustion and controls shutoff valve

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3
Q

Describe the Variable Geometry Actuator

A

consists of two fuel driven actuators controlled by the FADEC via FMU, optimizes position of compressor stators for efficiency

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4
Q

The engine starting system is comprised of:

A
  • air turbine starter

- starter control valve

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5
Q

How many igniters are used for start

A

ground - one

air - both (2)

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6
Q

Does the FADEC provide abnormal engine start protection in the air

A

NO

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7
Q

Describe the auto relight function

A

turns on both igniters and schedules the relight fuel flow in the event of engine flame out or if N2 falls below 52%; “WML” icon is displayed next to N2

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8
Q

How is the thrust reverser system actuated and controlled

A

hydraulically actuated, control via thrust lever

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9
Q

What does the T2 sensor monitor

A

engine air inlet temperature for use in FADEC control calculations

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10
Q

What does the N1 sensor provide

A

fan speed data and airplane vibration monitoring

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11
Q

How is the FADEC powered

A

above 50% N2 - Permanent Magnet Alternator (PMA)

below 50% N2 - electrical system

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12
Q

The FADEC provides engine start protection on the ground as follows:

A
  • hung start
  • hot start
  • no light off
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13
Q

Describe the FADEC overspeed protection

A

commands engine shutdown when N2 reaches 102%, relights when within limits (unless 3 consecutive overspeeds)

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14
Q

Describe the FADEC overtemp protection

A

controls ITT limits for engine start and throughout operation; will not allow fuel flow during start if ITT is above 120C

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15
Q

Describe the ATTCS

A

available for takeoff and go around; automatically commands RSV when it is armed and thrust levers are at TOGA and one of the following occurs:

  • difference between N1 values is greater than 15%
  • one engine failure during takeoff
  • one engine failure during go-around
  • windshear detection
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16
Q

Max thrust rating in lbs

A

14,200 lbs (t/o 1 or GA, one engine operative, attcs on)

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17
Q

ENG 1 or 2 OIL LO PRESS warning

A

engine oil pressure is low

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18
Q

ENG 1 or 2 REV DEPLOYED warning

A

thrust reverser deployed unexpectedly or not stowed when ordered to stow or thrust reverser position undetermined

19
Q

ENG 1 or 2 CONTROL FAULT caution

A

thrust modulation is disabled. OBV has failed open or engine will respond slowly

20
Q

ENG 1 or 2 FADEC OVERTEMP caution

A

FADEC overtemperature has been detected

21
Q

ENG 1 or 2 FAIL caution

A

engine 1 or 2 shutdown has occurred

22
Q

ENG 1 or 2 FUEL IMP BYPASS caution

A

fuel filter impending bypass

23
Q

ENG 1 or 2 FUEL LO PRESS caution

A

engine 1 or 2 fuel pressure low, backup fuel pump will be activated

24
Q

ENG 1 or 2 NO DISPATCH caution

A

no dispact condition detected by FADEC

25
Q

ENG 1 or 2 OIL LO LEVEL caution

A

engine 1 or 2 oil level is below minimum

26
Q

ENG 1 or 2 REV FAIL caution

A

thrust reverser is not available

27
Q

ENG 1 or 2 REV PROT FAULT caution

A

reverser fault detected, operation not inhibited

28
Q

ENG 1 or 2 REV TLA FAIL caution

A

respective reverser solenoid protection has failed

29
Q

ENG 1 or 2 START VLV OPEN caution

A

start valve not closed while engine running

30
Q

ENG 1 or 2 T2 HEAT FAIL caution

A

T2 heater failed

31
Q

ENG 1 or 2 TLA FAIL caution

A

dual thrust lever angle sensor failure

32
Q

ENG EXCEEDANCE caution

A

in flight engine limit exceedance detected

33
Q

ENG NO TAKEOFF DATA caution

A

takeoff data not entered successfully, discrepancy between information entered in FMS for engine 1 and 2 detected

34
Q

ENG REF A-I DISAG caution

A

ice protection mode selector knob set to the ON position with OFF or ENG in the take off data set menu

35
Q

ENG REF ECS DISAG caution

A

discrepancy between REF ECS input and actual ECS bleed configuration

36
Q

ENG THR RATING DISAG caution

A

discrepancy between maximum thrust rating of engines 1 and 2, possible asymmetric engine thrust

37
Q

ENG TLA NOT TOGA caution

A

TLA not at TO/GA position during takeoff and/or go around phase

38
Q

ENG 1 or 2 FADEC FAULT advisory

A

one FADEC channel no longer sending data

39
Q

ENG 1 or 2 FUEL SW FAIL advisory

A

fuel pressure switch indicates pressure is not low while all fuel pumps are off

40
Q

ENG 1 or 2 OIL IMP BYPASS advisory

A

oil filter impending bypass

41
Q

ENG 1 or 2 OIL SW FAIL advisory

A

oil impending bypass switch or oil pressure switch failure detected

42
Q

ENG 1 or 2 SHORT DISPATCH advisory

A

short time dispatch fault condition

43
Q

ENG 1 or 2 REV INHIBIT status

A

reverser inhibited by mx

44
Q

ENG 1 or 2 TLA NOT IDLE status

A

thrust lever angle not set to idle position during engine start

Republic E170 (22 decks)

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