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