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52 Cards in this Set
- Front
- Back
What type engines do we have
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GE CF34 8E5
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Describe the engine
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High bypass, 2 spool axial flow, turbofan engine
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What is the max thrust put out by the engine
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14200
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Describe the N1 spool
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Single stage fan
4 stage LP turbine |
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Describe the N2 spool
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10 stage compressor w/variable geometry
2 stage HP turbine |
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How many igniters are there per engine
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2
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What is the power source for the FADEC
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PMA above 50% N2, below this values it is the aircrafts electrical system
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How many igniters activate for engine start
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Ground=1
Flight=2 |
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What happens when the ignition switch is put into overide
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Activates both igniters on the ground or in flight
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Can the igniters be turned off during flight
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Yes, but the FADEC disregards the command. The off is used during dry motoring on the ground
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What controls the engine
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A dual channel FADEC
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Why does the FADEC have two channels
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One is active and the other is on standby
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Is only one FADEC channel used all the time
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No, they alternate after each engine start
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What does the cyan line indicate on the N1 gauge during approach
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The minimum N1 for bleed required in icing conditions
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When does the cyan line on the N1 gauge appear
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RA Altimeter below 1200' and only in icing conditions with gear down or flaps extended
It indicates the minimum thrust needed to meet bleed requirement |
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What sources are available for engine start
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-APU
-External source (huffer cart/air bottle) -Opposite engine -Windmill start |
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Does the FADEC provide engine start protection
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Only on the ground for a hot start,hung start,no light off
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Does the FADEC provide engine proetction for an air start
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No
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What will the FADEC automatically do in case of hot start
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It will not allow fuel flow if ITT is >120 C
It will dry motor the engine and introduce fuel when ITT is <120 C |
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Describe the engine start sequence
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N2 starts increasing
7%N2=Ignition A or B 20%N2=N1 Increasing w/ Fuel flow Light Off occurs within 5 sec after fuel flow and ITT rising 50%N2=Ignition Off and oil positive indication |
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Describe a stable engine after start
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N1=27%
ITT=460 C N2=62% FF-480 lb/hr Oil Pressure>25 psi |
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What does WML indicate on the engine indications
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-Windmilling engine
-FADEC has detected a flameout and is trying to autorelight or an assisted start has been commanded |
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What provides overspeed protection
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FADEC via the FMU, approximately 52%N2 and 102%N2 respectively
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What happens after 3 overspeed detection events
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FADEC will not relight the engine
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What heats the fuel and cools the oil
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Fuel/Oil heat exchanger
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What is ATTCS and what controls it
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Automatic Takeoff thrust control system
It provides MAX thrust RSV according to the current rate previously selected via the MCDU |
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What controls the ATTCS
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FADEC
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What will trigger the ATTCS
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TO-1
TO-RSV (TL beyond TOGA) GA (2 ENG) GA-RSV (1 ENG OR WINDSHEAR) |
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What is FLEX
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Reduced takeoff thrust based on assumed temperature (tells the FADEC that it is warmer than it is so it will reduce the thrust)
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Can the FLEX thrust be reduced lower than the climb thrust
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No
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Does the engine, APU, and IDG share the same lubrication system
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No, they are all indepemndent
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When the engine is started what receives the air to begin the rotation
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Air turbine starter
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How are the engine thrust reversers controlled
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Hydraulic and the FADEC provides protection against inadvertent deployment
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What powers the FADEC below 50%N2
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The aircraft ESS electrical system
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What is the green tick mark on the N1 gauge
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Max N1 allowed for current thrust rating and operating conditions
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What is the moving arc on the N1 gauge
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Value requested based on TLA
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What is the cyan > mark on the N1 gauge
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Max N1 for selected engine thrust mode
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What happens if you are in max reverse and let go of the thrust levers
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They will move to minimum reverse
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What does the amber REV indicate
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Reversers are in transit
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How is the N1 limit indicated on the EICAS
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Red tickmark
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What is normal engine vibration range
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0-3.9
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Will the engine attempt an autorelight on the ground
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Yes, but it will stop when engine N2 falls below 50%
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Can you deploy a reverser on an engine that has failed
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Yes, up to 30 seconds following the failure, then it is locked out by the FADEC
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What is displayed on the EICAS if the ATTCS is activated
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The green ATTCS is replaced with CYAN and the RSV indication
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If the ATTCS is off will you get RSV with an engine failure or windshear on T/O in the TOGA position
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No
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What is flight idle
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The minimum required thrust to provide minimum engine bleed to the airplane
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What is the maximum thrust in GA? GA RSV?
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13000
14200 |
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When does the FADEC consider the anti-ice off
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Altitude below 1200 feet
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At what RPM will the FADEC shutdown the engine in flight and on the ground
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102%
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Will the FADEC command an autorelight if RPM exceeds 102%
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Yes, but if there is 3 overspeed detections within 30 seconds then no
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Normal takeoff thrust is how many lbs
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13000
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During an engine flameout what will the FADEC do to the EDP
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Depressurize it to reduce torque loads on the engine to facilitate a windmill start
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