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34 Cards in this Set
- Front
- Back
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How many PCUs are on each aileron and what powers them?
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2 PCUs on each, left uses 1 & 3, right uses 2 & 3
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How can a jammed PCU be overcome on each flight control system?
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Ailerons: pilot override, shear rivets off PCU; Elevator: jam-tolerant input rods allow other side to move if both PCUs fail; Rudder: anti-jam breakout mechanism
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What is the priority and degree of travel for each horizontal trim system?
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Pilot/Copilot manual trim - 5deg/sec; Autopilot trim - 1deg/sec (flap transition - .5deg/sec); Mach trim - .03-.06deg/sec
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How does the HSTCU control stab trim?
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It commands 2 electric motors to drive a jackscrew 0 to -9deg
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When is the stab trim runaway warning activated?
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When the stab trim moves .3deg/sec for +3 seconds
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How many PCUs are on each elevator and what powers them?
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2 PCUs on each, left uses 1 & 3, right uses 2 & 3
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How many PCUs are on the rudder and what powers them?
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3 PCUs, uses 1,2 & 3
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What is the purpose of Mach Trim?
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It compensates for the rearward shift of the aerodynamic center of pressure as mach number increases
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What are the requirements needed for Mach Trim to engage?
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At least one stab trim engaged, hand flying at speeds > .4 Mach, no pilot stab trim inputs
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What are the mechanical differences between aileron and rudder trim?
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Aileron: PCUs are signaled to deflect the ailerons, control wheel moves; Rudder: applied by trim actuator into the yaw damper/trim mixer assembly, pedals do not move
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How many PCUs are on each spoiler and what powers them?
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2 PCUs on each, uses 1 & 2
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How many degrees is full deployment of the spoilers?
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40 degrees
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"FLT SPLR DEPLOY" caution
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Spoilers are deployed and RA is 10-300' or N1 on either engine < 79%, RA inop - any time the landing gear is extended
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Describe the 20% Detent Mechanism.
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Prevents asymmetrical deployment of the spoilers; if spoilers > 20%, instead of spring-loading retracted, they are forced to hold a mid-position
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"FLT SPOILERS" caution
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Ground: failed detent mechanism, loss of 1 or 2 hyd pressure; Flight: loss of 1 or 2 hyd pressure
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How many degrees is full deployment of the ground spoilers?
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45 degrees
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How many PCUs are on each ground spoiler and what powers them?
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1 PCU, uses 1
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What controls deployment and retraction of the ground spoilers? What inputs does it use?
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PSEU - proximity sensor electronic unit; monitors inputs from ground spoilers, flight spoilers, throttle lever position, and anti-skid control unit
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What powers the PSEU?
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DC BUS 1 & 2
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When are the ground spoilers automatically armed?
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switch in AUTO, thrust > min takeoff setting, wheel speed > 16 kts
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When are the ground spoilers manually armed?
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switch in AUTO, spoiler lever > 1/4 detent --or switch in ARM
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When are the ground spoilers automatically deployed?
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switch in ARM or AUTO, thrust at idle, WOW or wheel speed > 16 kts
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When are the ground spoilers automatically retracted?
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Thrust > idle --or thrust < min takeoff setting, wheel speed < 16 kts, aircraft is on the ground > 3 seconds
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When are the ground spoilers manually retracted?
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Switch in disarm --or spoiler lever < 1/4 detent (if in AUTO and spoilers were extended manually)
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What do the colored arcs on the SPS gauge represent?
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Blue - continuous ignition, Yellow - stick shaker and autopilot disconnect, Red - pusher, "STALL" icon, master warning, warbler
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How is the stick pusher disconnected?
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Stall Prot Pusher switch "OFF", stick pusher disconnect is held, G-switch activation (0.5G), AOA decreases
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"ALT COMP FAIL" caution
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Left or right altitude compensation circuit of the SPC has failed
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"GND SPLRS DEPLOY" caution
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Spoilers are not stowed and RA > 10'
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"STALL FAIL" caution
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One or both SPS channels has failed, stick pusher inop
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"FLAPS MOTOR OVHT" status
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One flap motor overheated (half speed, starts again when cooled)
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"FLAPS FAIL" caution
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Both flap motors have overheated or failed
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What is the purpose of the aileron and elevator flutter dampers?
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Prevent flutter when hydraulic power is lost to the PCUs
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How are the flap motors powered? Are flaps available on emergency power?
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Motor 1 - AC ESS BUS, MOTOR 2 - AC BUS 2, 1/2 speed on emergency power (604 - no flaps)
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Under which conditions will the ground spoilers deploy?
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spoilers must be armed, landing or rejected takeoff
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