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E-Jet EMB175 > Engine > Flashcards

Flashcards in Engine Deck (14)
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1
Q

What is Max trust?

A

14,200 lbs

2
Q

What engines are on the E-175?

A

General Electric CF34-8E5

3
Q

What type of engine is on the E-175?

A

Hi-bypass/dual-rotor turbofan

  • 10-stage compressor with variable geometry/ 2-stage HP turbine
  • 1 stage fan/4-stage LP turbine
4
Q

Engine Lubrication system

A

Each engine, IDG and the APU have their own independent system

5
Q

How can each engine be started?

A
  • APU air
  • Crossbleed air source
  • External air start
  • Windmilling start airborn
6
Q

How man igniters?

A

Two per engine

7
Q

Start sequence controlled by?

A

FADEC controller

8
Q

Normal starter sequence?

A
  • N2 rotation 7% N2 - Ignition
  • 20% N2 fuel flow (lights-off with in 5 sec) Normal access & oil pressure
  • 50% N2 ignition off & starter cut-out Normal access & Stabilization
9
Q

How are thrust reversers actuated?

A

Hydraulically actuated

10
Q

What protects against inadvertent deployment?

A

FADEC provides interlock protection against inadvertent deployment
- Idle trust commanded if opened in flight

11
Q

ATTCS (automatic takeoff thrust control system)

A
  • Controlled by FADEC
  • Automatically provides max engine thrust (RSV) whenever its armed, thrust levers TOGA, and
    • Difference between N1 values > 15%
    • One engine failure during takeoff
    • One engine failure during go-around
    • Windshear detection
  • Automatically armed for normal go-around (GA) mode`
12
Q

What is minimum oil pressure after engine start?

A

-25 psi

13
Q

What is the minimum PSI for crossbleed start?

A
  • 40 psi
14
Q

When starting when is fuel introduced?

A
  • Fuel is automatically introduced when N2 is 20% and as long as ITT IS 120 degrees or less.