Engine Flashcards
What engine is installed in the 195?
General Electrics CF34-10E
What happens when you set ignition to OFF in the flight?
Nothing.
Fadec disregards OFF-position in flight.
What happens when you set ignition to OVRD in flight?
Both exciters are activated.
What happens when you set ignition to OFF on ground?
Ignition system is deactivated and fuel flow is inhibited.
What detents are available for thrust levers?
MAX
TOGA
IDLE
MIN REV
MAX REV
What different kinds of idle are there?
Flight idle
Approach idle
Final approach idle
Ground idle
In icing conditions, for which kinds of idle do you get a N1 increase?
Flight idle and approach idle.
For final approach idle you only get a
N1 wing anti-ice cyan line on the N1 indicator.
What indication do you get beside the ITT indicator when an auto relight operation is in progress?
WML
(Wind milling)
Start sequence ground:
When does FADEC initiate ignition?
N2 7%
Start sequence ground:
When does FADEC initiate fuel flow?
N2 20-25 %
(Depending on altitude)
Start sequence ground:
Successful start:
When does FADEC disengage starter?
N2 50%
On ground and engine flame out:
For how long time are you able to deploy thrust reverser?
30 seconds.
If one thrust reverser fails and both TL are set to MAX REV, how much reverse will you get?
Only MIN REV
If one thrust reverser fails and you set only the operative to MAX REV, how much reverse will you get?
MAX REV
What does the Engine Control System consist of?
- FADEC
- Thrust Lever
- T2 and N1 sensors
When does the active and standby channels of the FADEC switch tasks?
- Failure of active channel
- Each engine start
Above N2 50%, what is the power source for the FADEC?
PMA
(Permanent Magnetic Alternator)
Name 7 areas the FADEC controls.
- Engine Fuel Metering Unit.
- Variable geometry valve.
( To improve N1 efficiency) - Bleed Valve
- T2 sensor heater.
(Preventing ice accumulation) - Thrust reverser actuation
- Engine starting
- Ignition for engine start and dry motoring. Also preventing engine flameout.
When does the ATTCS system engage during a take off?
Thrust levers at TOGA
When does the ATTCS system activate?
(Provided TL at TOGA)
( 4 occasions)
- N1 diff > 15%
- OEI during Take off
- OEI during Go around
- Windshear detection
Which is the minimum flex take off thrust?
Highest of:
1. 75%
2. CLB-2 + 1% N1
Can you use a flexible take off with ATTCS system OFF?
Yes
When flex is used:
What happens when you set TL to MAX?
Flex temperature is cancelled.
Max thrust is given according to max thrust available.
What three inputs does the FADEC use to calculate max N1?
- Altitude
- Temperature
- Airspeed
How does the thrust rating mode GA become active?
- Gear and Flaps DOWN (Automatically)
- Manually by pressing TOGA switches.
(Provided TRS mode is CRZ, CON, CLB)
Which is the highest possible Thrust Rating?
GA RSV
(Go Around Reserve)
Approach idle:
What is the purpose of having that?
When does it become active?
Purpose: enables a rapid acceleration to GA thrust.
Active:
1. In flight
2. < 15 000 ft and
3. Flaps 1 or higher,or Gear Down.
When does Final approach idle become active?
All of following:
- < 1200 ft AGL
- Landing flaps
- Gear down
When does FADEC sense over speed?
N2 102%
