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54 Cards in this Set
- Front
- Back
PRIMARY FLIGHT COMPUTERS (PFCs) DISC AUTO DISC LT |
DISC-disconnects the PFCs from the flt ctrl sys -pus the flt ctrl sys in the direct mode -AUTO can be reselected to attempt restoration of the secondary or normal mode operation. AUTO-the flt ctrl sys operates in the norm mode -sys faults automatically cause the sys to sw to the secondary or direct modes DISC(Illum amber)-the PFCs are disconnected either automatically or manually and the sys is in the direct mode |
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ATLN PITCH TRIM Switches |
Spring loaded neutral Push (both switches) -on the gnd, directly moves the stabilizer -in the air in norm mode, changes the trim reference airspeed -in the air in the secondary mode and direct modes, directly moves the stabilizer |
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NORM CUTOUT |
NORM-electrical pwr is supplied to the related stabilizer control unit -L2-the related left 235 Vac bus -R2-the related right 235 Vac bus -if unsheduled stab motion is detected, electrical pwr to the related stab control unit is automatically shut off CUTOUT-shuts off electrical pwr to the related stab control unit |
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On the GND Reacting to THR LVR and REV |
GND-the speedbrake lever moves to DOWN, all spoiler panels retract if either THR LVR is advanced to the T/O THR POS -SPD BRK LVR moves to UP and all spoiler panels EXTD if both REV THR LVRS are raised to the reverse idle detent |
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DOWN ARMED UP |
DOWN-(detent)-all spoiler panels are retracted. ARMED-auto SPD BRK SYS is armed UP-the required spoiler panels EXTD to their maximum in-flight or on-ground position (intermediate positions can be selected) |
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ALTN FLAPS ARM |
Push (ALTN displayed) -arms the alt flap ctrl mode -arms the alt flap selector -disables primary and secondary flap/slat mode operation -asymmetry/skew and uncommanded motion protection, slat autogap, and flap/slat load relief are not available. -flap lever is inoperative |
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RET OFF EXT |
RET-retraction is accompished electrically and sequenced so that full flap retraction occurs before the slats begin to retract. OFF-alt flaps are deactivated EXT-slats and flaps are electrically extended -maximum extension is flaps 20, with slats at the midrange position. |
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NORM LOCK FAIL |
NORM-respective flt ctrl surfaces are unlocked LOCK-(illum amber)-respective flt ctrl surfaces are electrically locked -EICAS advisory message FLT CONTROL LOCKED is displayed FAIL-(illum amber)-a flt ctrl surfaces lock switch is selected and any of the respective flt ctrl surfaces are not locked |
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FLAP Sequence |
1-slats to mid position 5, 15, 20-flaps move 25-slats to full extend position 30-flaps move |
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FLAP modes |
Primary Secondary Alternate |
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Protections in primary |
Asymmetry Flap Slat Disagree Flap/Slat load Relief Slat Autogap Slat pregap |
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Auto switch to secondary mode |
-center hyd sys failed, or -control surfaces travel at less than 50% of the normal hyd rate, or -flap or slat primary control failure, or -primary mode fails to move flaps or slats to the selected position, or -uncommanded flap or slat motion is detected. |
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Flap limit in secondary or alt mode |
flaps 20 |
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flap load relief settings
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15, 20, 25 or 30 only relief up to flap 5 only in primary mode |
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slat load relief |
available in primary or secondary mode if fully extended slats above 225, will retract to mid, go back to full extend when below 225 KIAS |
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slat autogap |
only in primary mode slats in mid position and below 225 KIAS with high AOA autogap extends slats fully will retract to mid with reduced AOA secondary mode is too slow for autogap |
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slat pregap |
in secondary mode, autogap too slow to respond slats will full extend with flap selector out of UP and below 225 KIAS slats remain in extended position until flap lever is up OR above 225 KIAS |
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Crusie flap |
automatically moves flaps, ailerons, spoilers and flaperons to optimize camber. only in cruise above FL 250 between .54-.87 M |
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Flap and Slat asymmetry detection |
in primary and secondary modes |
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uncommanded flap or slap motion detects |
flap or slat; -move away from commanded position, or -continue to move after reaching a commanded position, or -move in a direction opposite to that commanded if primary, (PRIMARY FAIL0 auto to secondary, if continues, shuts down system (FLAPS DRIVE, SLATS DRIVE). |
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FLAPS SLATS DISAGREE |
In primary and moving at half the normal rate, auto transfers to secondary (PRIMARY FAIL), if the rate continues at less than have the normal rate, system shuts down (FLAPS DRIVE, SLATS DRIVE). |
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When is the autodrag function available?
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"only in the landing configuration, flaps 25 or 30 and thrust levers at idle"
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How is the horizontal stabilizer powered in the 787?
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by an electric control unit powered by L2 and R2 AC busses
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What is the purpose of the cruise flaps function in the 787?
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optimizes cruise performance by varying the wing camber reducing drag
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Which hydraulic systems supply 5 pairs of spoilers?
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all three hydraulic systems
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When is the digital readout on the Stabilizer Position Indicator displayed in green?
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when the FMC performance data is entered and the trim pointer is within the green band
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"What condition will cause the stabilizer position indicator digital readout to be replaced with an ""X"" and the pointer to be amber?"
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Stabilizer trim is inoperative.
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Do the rudder pedals move with rudder trim operation?
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yes
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How do the flaperons move to provide more lift to improve slow speed performance?
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The flaperons droop with the trailing edge flaps.
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How are the alternate pitch trim switches linked in the 787?
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electrically to the horizontal stabilizer trim actuator and mechanically to the stabilizer
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What does the EICAS message FLIGHT CONTROL MODE indicate?
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The flight control system is in the secondary mode.
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What is the purpose of the flap gate at the Flaps 1 position?
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prevents inadvertent retraction of the slats html>
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What is the purpose of the flap gate at the Flaps 20 position?
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prevents the inadvertent retraction of the flaps past the go-around position
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What are the three operating modes of the primary flight control system?
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"Normal, Secondary and Direct"
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How is pitch and roll control accomplished if all hydraulic power is lost?
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electrically activated stabilizer and two spoiler pairs using pitch trim switches and the control
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What function is provided by the spoilers?
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roll control and speedbrakes
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What control surfaces provide roll control in low speed flight?
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"Ailerons, Flaperons and Spoilers"
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At what approximate speed does the single rudder become aerodynamically effective to provide yaw control?
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60 knots groundspeed
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"When the two FLIGHT CONTROL SURFACES lock switches are in the locked position, at what speed do the flight control surfaces automatically unlock?"
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when groundspeed exceeds 40 knots
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The autopilot is available in what Primary Flight Control System Modes?
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Normal mode only
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"When the flight control system is operating in the secondary mode, what functions are NOT available?"
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"Envelope protection, Autopilot, Tail strike protection"
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How can the Primary Flight Control System be changed to the direct mode?
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automatically or manually
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What is available for pitch trim in the normal mode when the stabilizer is manually shutdown or has failed?
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Pitch trim is available through the elevators.
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In what Primary Flight Control Modes is column cutout available?
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Normal and Secondary
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What is the bank angle protection boundary?
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approximately 35 degrees
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What conditions must be present for the slat autogap function to be available?
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slats in the middle position and airspeed below 225 KIAS
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EICAS STAB GREENBAND (3) |
-Computed green band disagrees with pressure transducer data, or -the two transducer values are not within the set tolerance, or -either transducer has failed |
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What functions are not available in Secondary or Direct Mode? (7) |
*Autopilot *Auto speedbrake *envelope protection *Gust suppression *Pitch compensation *roll/yaw asymmetry compensation *tail strike protection |
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Flight envelope protection provides? (3) |
* bank angle protection * overspeed protection * stall protection |
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Speedbrake lever moves to UP (armed) |
main gear trucks untilt and both thrust levers are not in the takeoff range. |
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Speedbrake lever moves to UP (not armed) |
*on GND and GND SPD >85 knots, either thrust lever was previously in the takeoff range, then both thrust levers are moved to the idle range (rejected takeoff), OR *on GND and both thrust reverse levers are moved to the reverse idle detent. |
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Speedbrake automatically driven to DOWN |
*on GND, when either THR LVR is moved to T/O range, OR *on GND, if there is a transition to in the air, OR *in FLT, when either THR LVR is beyond 90% full travel. |
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Auto Speedbrakes are available in what mode? |
Normal mode only. |
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When does Autodrag operate? Mode? When is it removed? What controls do what? |
*flaps 25,30 THR LVRs at IDLE *Normal mode *Below 500' AGL *ailerons and 2 most outward spoilers move are raised when aircraft is on or above G/S or G/P |