Engine Flashcards
What type of engines
GE CF-8E5
Hi bypass
2 Spool
Axial Flow
Turbo fan
Describe N1
Single Stage FAN
4 stage LP turbine
Describe N2
10 stage compressor
2 stage HP Turbine
Does the FADEC provide protection
Ground:
Hot start
Hung start
No light off
Start Sequence
7% N2 Ignition
20% N2 Fuel Flow
20% N2 + 5 sec light off
50% N2 starter Cut off
Engine Stabilizes
N1 27% iTT 460c N2 62% Fuel flow 550lbs / hr Oil pressure ^ 25 psi
What does WML on engine indication mean
Windmilling engine
FADEC has detected a flameout and is attempting an auto relight
An assisted start has been commanded
What provides under speed and over speed protection?
FADEC via FMU
52% and 102% N2
What is ATTC what controls it
Automatic takeoff thrust control system
Provides max thrust according to previous setting
FADEC controlled
What triggers an ATTCs event
N1 difference more than 15%
Engine failure in TOGA
Wind shear
What thrust rating is limited to 5 minutes
TO 1
TO reserve
GA
GA reserve