The auto-relight mode is automatically initiated by the FADEC for engine flameout. In this mode, FADEC energizes at least one igniter continuously and schedules fuel flow until rpm stabilizes.
The EEC will provide an auto relight function in order to detect and recover an engine flameout. In this mode, FADEC energizes BOTH igniters continuously and schedules fuel flow until rpm stabilizes. The auto relight function will only be enabled when the engine is at or above idle. Auto relight is disabled when the applicable FUEL CONTROL switch is selected to OFF.
Secondary engine indications or supplemental engine data is related to engine performance but not directly employed by the EEC in the control of engine operation.
A change to alternate control mode, which is initiated by FADEC, is known as soft reversion. A change initiated by pilot, through selections made on the SMC (Sensor page), is known as hard reversion.
Electronic Engine Control System (STATUS messages) - Takeoff is not authorized with a DND (Do Not Dispatch) but it is permitted with a STD (Short Term Dispatch) status message displayed.
Takeoff is not authorized with a DND (Do Not Dispatch) or with a STD (Short Term Dispatch) status message displayed.
Although the use of continuous ignition is not time limited, prolonged operation will reduce exciter and igniter service life.
How many idle settings are there?
Flight Idle is the minimum thrust rating that can be used in flight and is generally a higher thrust setting than Ground Idle, depending upon airframe configuration (e.g., flaps, weight-on-wheel, etc., and engine conditions, such as bleeds, TRUs, etc.). Approach Idle (High Idle) is directed by landing configuration and it is higher to support aborted landings and maximum reverse thrust demands. Ground Idle (Low Idle) is the lowest thrust rating for sustained ground operation while ensuring stable operation within the safety margins of the engine.
Maximum Wind Velocity (With Cowl Doors Open and Locked) - Cowl doors are designed to withstand wind speeds of up to _____ in any direction, when properly secured (front and rear dampener hold-open rods).
Thrust reverser indications – a white REV indicates that the reverser is fully deployed (maximum reverse thrust available).
White REV indicates that the thrust reverser is unlocked. Green REV indicates that the thrust reverser is fully deployed (maximum reverse thrust available). Amber REV indicates that an uncommanded deployment of the thrust reverser has been detected on the ground: engine limited to idle. Flashing red REV indicates that deployment in flight has been detected: engine limited to idle.
Nacelle components are interchangeable between left and right engines.
Nacelle components are not interchangeable between left and right engines.
The EEC does not limit the number or duration of starter operations. This is the responsibility of the flight crew.
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Immediately upon detection of a flameout, the EEC energizes both igniters and schedules fuel flow until the engine relights. The igniters remain energized for _____ after detection of engine relight.
If, however, the engine does not recover and continues to run down, then the EEC will close the Pressure Regulating Shutoff Valve (PRSOV) at 35% HP and de-energize the igniters.
What happens during engine shutdown if capacity of drains tank (environmental container) is exceeded?
What’s the only time you’re fully FADEC protected during an engine start?
The 'rotor bow' is a phenomenon where LP and HP shafts warp or bow due to uneven temperatures after shutdown.
What are the requirement for approach idle to be active?
Ignition systems are capable of being continuously energized by pilot selection of continuous ignition.
There’s no time limitation. However, continued or very frequent use shortens igniter life.
At what fuel tank temperature does heated fuel return system cease to operate?
What are the requirements for engaging autothrottles on takeoff?
When would you expect FADEC to perform an automatic rotor bow avoidance procedure during engine start?
During engine start, when would you expect Starter Air Valve (SVO) and IGN icons to extinguish?
A green IGN message appears next to the Engine Indicating (EI) display HP indicators when the ignition system is active. This indication appears automatically during a normal start sequence or upon entering the auto-relight or inclement weather mode. During normal starts, the green IGN icon usually extinguishes at approximately 42% HP rpm.
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When normal ground start attempt is aborted due to anomalies, FADEC automatically selects the other igniter on the following normal ground start attempt.
What would be the corrective action for an Autostart Abort?
Alternate start mode is selected when MASTER CRANK switch is placed to ON. In this mode, what can the FADEC not do?
How many airstart procedures are there?
Autothrottle servos are deenergized to prevent unwanted thrust reductions during critical takeoff between 60 kts airspeed, rotation and climbout to ____ AGL.
The fixed power lever position is maintained until 400 feet, at which time the FMS will position the power levers to the climb power setting selected on the PERFORMANCE INIT page of the MCDU as long as another vertical mode has been selected i.e. FLCH, Vertical Speed, or Autopilot ON.
When does Fluid Quantity Indicator (FQI) take a snapshot of oil quantity and store it as a historical reading?
At what altitude must the boost pumps be operating to sustain engine operation?
The maximum wind speed for opening cowl doors is:
The EEC is the primary control unit of the FADEC system and thus receives and transmits all the necessary control signals. The unit has three computer channels, Channel A, Channel B, and Channel C which are isolated / independent of each other.
The unit has two computer channels, Channel A and Channel B, which are isolated / independent of each other.
Under what condition(s) would you use the Manual Airstart - Windmilling procedure?
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