Flashcards in Engine Deck (25):
What types of engines are on the aircraft?
2 General Electric CF-34-8E5
-HI-bypass, 2 spool, axial flow, turbo fan
How much thrust do the engines produce?
Describe N1 spool
-Single stage fan
-4 stage LP turbine
Describe N2 spool
-10-stage compressor (gas generator)
-2-stage HP turbine
How many igniters per engine?
2 per engine
How many igniters activate for engine start?
Ground - 1 igniter (switch in Auto)
Flight - 2 igniters (switch in Auto)
What happens when the ignition switch is selected to OVRD?
Activates both igniters on the ground or in flight
Can the igniters be turned off during flight?
-The switch may be moved to the OFF position but the FADEC disregards the command
-The OFF position is used for DRY motoring on the ground only
What controls the engine?
-A two channel FADEC
-One channel is active and the other remains in standby as a backup
Is only one FADEC channel used every flight?
NO. They automatically alternate with each engine start
What does the Cyan line on the N1 gauge represent during the approach? When does it appear?
-The minimum N1 for bleed requirements in icing conditions
-Configured for landing
What sources are available for engine starting?
-Ground Source (Huffer cart or Air bottle)
Does the FADEC provide engine start protection?
Only on the ground for a hot start, hung start, or no light Off
What will the FADEC automatically do in case of a Hot-start?
-FADEC will not allow FF if ITT > 120°C
-FADEC will automatically dry motor engine and introduce fuel when ITT
What does WML mean on the engine indications?
-The FADEC has detected a flame-out and is attempting an auto-relight, or
-An assisted start has been commanded
What provides under-speed and over-speed protection?
-The FADEC via the FMU
-Approximately 52% N2 and 102% N2 respectively
What happens after 3 overspeed detection events?
FADEC will NOT re-light the engine
What heats the fuel and cools the engine oil?
Fuel/oil Heat exchanger
What is ATTCS? What controls it?
-Automatic Takeoff Thrust Control System
-Provides Max thrust reserve (RSV) according to current rate previously selected via the MCDU
What will trigger an ATTCS event?
-N1 difference > 15% between engines
-Engine failure during TOGA
When is thrust reverse available?
Weight on Wheels (WOW)
What happens if a thrust reverser inadvertently deploys?
FADEC limits respective engine thrust to idle
What engine thrust rating(s) may only be used for 5 minutes?
-TO-RSV (TL beyond TOGA)
-GA (2 engine go around)
-GA-RSV (one engine GA or windshear)
What is FLEX?
Reduced T/O thrust based on assumed temperature (telling the FADEC that it is warmer than it actually is so it will reduce the thrust)