Terms in this set (73)
What engines are on the A320?
What is driven by the accessory gearbox?
Lubrication Unit (oil pumps)
FADEC and alternator
What is the function of the Engine Interface Unit (EIU)?
The Engine Interface Unit (EIU) in each engine receives inputs from the engine controls, bleed and air conditioning, FMS, FMGCs, and ADRs and feeds information to the FADEC
If a FADEC channel fails, what happens? Both?
The other takes control and an ENG FADEC FAULT ECAM message is displayed. If both fail, the engine fails.
What will FADEC commands engine idle increase for?
High engine or IDG oil temps
During an automatic start, what happens if the engine exceeds a start limit?
The FADEC interrupts the start, attempts to correct the problem by adjusting fuel flow or ignition and either continues or aborts the start and dry cranks the engine.
When does the FADEC not have start abort authority?
During manual starts on the ground and all in flight starts. It will only monitor limits and provide cautions if a limit is exceeded
If the thrust levers are between detents, what will the FADEC set for the thrust?
The next higher detent
Using manual thrust, what protections does the FADEC provide?
N1 and N2 RPM limits
If the thrust levers are placed in the FLEX/MCT detent on takeoff and a FLEX temp is not set, what happens?
ENG FLEX TEMP NOT SET message is displayed. Advancing the thrust to TOGA allows the takeoff to be continued and erases the messages.
If the runway is changed in the FMS, is the FLEX temp also erased?
No, after a runway change you must ensure the FLEX temp is still valid for the new runway
When will FADEC allow higher than reverse idle thrust?
FADEC will limit reverse thrust to idle until all 4 blocker doors indicate open
While using reverse thrust, which part of the engine thrust is reversed?
Only the fan air is reversed by the 4 blocker doors
How many engine cowl latches are on each engine and where are they located?
Three manually locked latches at the 6 o'clock position on the engine.
How is the FADEC normally powered when the engine is running?
Electrically powered by a dedicated alternator that is independent of the aircraft electrical system.
How is the FADEC powered if the dedicated FADEC alternator fails?
The FADEC will revert to aircraft electrical power.
How is the FADEC powered during the engine start sequence?
When the ENG MODE selector is rotated to IGN/START the FADEC is powered by the aircraft electrical system. During engine start, the dedicated alternator will automatically power the FADEC when engine rotation is sufficient.
When will the FADEC conduct a self test?
After initial power up and after engine shutdown a self test is conducted using aircraft electrical power.
Pulling what circuit breakers will result in an engine failure?
Pulling the EIU, ECU, or FADEC circuit breakers may result in complete FADEC power failure, and failure of the associated engine
How can the flight crew determine the FADEC is powered?
If the FADEC is not powered, the engine indications on the E/WD are replaced by amber XXs.
What are the six thrust lever detents?
5. IDLE REV
6. MAX REV
When will the aircraft electrical power be completely isolated from the FADEC?
When the ENG FIRE pb is released. The FADEC will remain self powered if engine rotation is sufficient.
Are there any mechanical linkages between the thrust levers and the engines?
No. Thrust control is completely electronic.
How is A/THR armed on the ground?
1. Setting thrust levers in the TOGA or FLEX detent
2. At least one FD on
How can the pilot determine the A/THR is armed?
A/THR in column 5 of the FMA is blue
How can the pilot determine the A/THR is active?
A/THR in column 5 of the FMA is white
What is the active range of the A/THR?
2 engines - just above idle to CL detent
1 engine - just above idle to MCT detent
What are the three ways to disconnect the autothrust?
1. A/THR pb
2. Autothrust instinctive disconnect buttons
3. Thrust levers to idle
What is the preferred method of disconnecting the autothrust?
1. Set the thrust levers to match the TLA
2. Press the autothrust instinctive disconnect pb
What happens if either autothrust instinctive disconnect is pressed for 15 seconds?
The autothrust system is deactivated for the remainder of the flight. Alpha Floor Protection is lost.
What is the normal takeoff thrust mode?
Selection of reverse thrust will also deploy what?
The ground spoilers, assuming the have not automatically deployed.
What are the three FADEC idle modes?
1. Modulated Idle
2. Reverse Idle
3. Approach Idle
What is modulated idle?
Active anytime the aircraft is on the ground, and not in reverse thrust, or in flight with the slats retracted. Idle RPM is dependent on bleed demands, oil temps and mach number.
What is reverse idle?
Active when the thrust levers are in the REV IDLE position. It is a slightly higher idle than the modulated idle.
What is approach idle?
Active whenever the slats are extended. Idle is approx 4-8% higher N1 (thrust increase minimal) than modulated idle. Allows the engines to accelerate rapidly from idle to TOGA.
How is the engine oil cooled?
How many ignition systems are on each engine?
Two. A & B
Which igniter is capable of being powered when in the Emergency Electrical Configuration?
Igniter A. Therefore, igniter plug A must be operational for all flights
How does automatic ignition operate when performing an automatic ground start?
The FADEC will select which igniter plug to use and activate ignition when N2 reaches 16%. The FADEC alternates igniter selection with each successive start. The selected igniter is displayed on the ECAM Engine page. Ignition is automatically stopped when N2 reaches 50%.
When does the FADEC automatically activate continuous ignition (both igniters)?
1. Engine anti-ice ON
2. Delayed engine start is sensed
3. EIU fails
4. Engine flameout
How can the flight crew determine continuous ignition has been activated?
IGNITION appears in the ECAM memo section
How can the flight crew manually select continuous ignition?
By rotating the ENG MODE selector to IGN/START
Which igniters are used during a manual engine start?
Both, A & B.
Even during an automatic start, how can the flight crew manually abort any engine start?
Master Switch to OFF
During an automatic start, if the FADEC senses a start abnormality, is any pilot action immediately required?
No. The FADEC will attempt to rectify the start malfunction and can perform up to four automatic start attempts. If the start malfunction cannot be corrected the start is automatically aborted. The crew will be prompted to turn the ENG MASTER SW to OFF.
When will the FADEC abort a start?
Only during a normal automatic start on the ground for:
1. Hot start
2. Stalled start
3. No ignition
What type of start abnormalities can the FADEC not identify or correct?
Hung start or tail pipe fire. There are also no associated ECAM messages.
In the event of a hung start or tail pipe fire, what must the flight crew do?
The start must be manually aborted by placing the Engine Master Switch to OFF.
For an automatic ground start, what constitutes one complete start cycle?
1. ENG MODE selector to IGN/START
2. Engine Master Switch to ON
3. Engine Master Switch to OFF
What is accomplished by selecting the ENG MAN START pb ON?
Commands the start valve open
During a manual start, will the start valve automatically close or will the flight crew close the valve by selecting the ENG MAN START pb OFF?
The FADEC will automatically close the start valve and shutoff ignition when N2 reaches 50%. However, the flight crew will still be required to select the ENG MAN START pb OFF.
During a manual start, does the FADEC have automatic abort authority?
No. Pilot action will be required should a malfunction occur
When would you use a manual start?
1. After a failed auto start
2. Hot and/or High conditions
3. Low starting air pressure
In flight, if the FADEC senses an engine flame out, will it attempt to perform an automatic restart?
Yes. The FADEC will automatically activate continuous ignition and adjust fuel flow in an effort to restart the engine
What can be done if an engine's starter control valve fails to open?
Maintenance personnel can manually open the engine's starter control valve through an access panel on the right side of the engine's cowl.
How is engine dry cranking performed?
1. ENG MODE selector CRANK
2. ENG MAN START pb ON
No fuel or ignition is provided
When is the fuel used display for an engine reset to zero?
When the associated engine is started?
What does the white circle on the N1 indication represent?
The position of the thrust lever
What does the amber tick mark on the N1 indication represent?
The FADEC computed maximum N1 for the current ambient conditions
What does the red arc on the N1 indication represent?
The beginning of the red arc represents the maximum permissible N1. If N1 exceeds this value, a red tick mark appears at the highest attained value.
Following start, if continuous ignition is required, how is it selected?
The ENG MODE selector must be reset to NORM and then back to IGN/START.
If the FADEC senses that its respective engine N2 has decreased below a preset limit?
An automatic relight is initiated. FADEC automatically activates continuous ignition and adjusts fuel flow to restart the engine.
What protections are provided at the TOGA stop (max power)?
FADEC always prevents the engines from exceeding RPM limits, but does not prevent the engines from exceeding temp limits.
How is MCT selected after a FLEX takeoff?
The thrust levers may be moved to either TOGA or CLB and then back to MCT. AOM procedure is to select CLB then MCT.
What is the most direct means to shutting down an engine?
Selecting the ENG MASTER switch to OFF. This closes both the LP and HP fuel valves.
What happens automatically when the engine MODE is selected to IGN/START?
1. ENGINE SD is displayed
2. FADEC is connected to aircraft power
3. Pack valve closes
When will the pack valve automatically open with the engine MODE is selected to IGN/START?
If the ENG MASTER switch or MANUAL START pb is not selected within 30 seconds, the pack valve will automatically open.
What will illuminate the FAULT light on the engine control panel?
1. An automatic start is aborted
2. A disagreement exists between the HP fuel valve and its commanded position
What will illuminate the FIRE light on the engine control panel?
A fire warning has been detected....This light is a repeater from the warning light in the ENG FIRE pb.
If an engine master switch fails, what is an alternate means of shutting down an engine?
The ENG FIRE pbs
What fuel valve is controlled by the ENG FIRE pb?
Only the LP valve. It may take up to 1 minute (at idle) for the engine to stop running as fuel is burned between the LP valve and the engine.
What does an amber "CHECK" indicate below an engine parameter?
There is a discrepancy between the N1, N2, EGT, or fuel flows values