FLIGHT CONTROLS Flashcards
Which flight controls are conventionally powered? Are the ailerons connected directly to the Captains or Co-pilots control wheel?
The ailerons and elevator are cable powered, the ailerons are connected to the FO control column.
Which flight controls are hydraulically powered?
Rudder, spoilers and flaps.
How is roll control achieved?
Spoilers and ailerons, the outboard spoilers lockout above 140/150kts
How is aileron trim applied?
The RH spring tab is repositioned.
How can you depressurise the roll spoilers?
Pressing the SPLR 1/2 pushlight or the INBD/OUTBD pushlights.
With the roll disconnect pulled, what does each control wheel control? Will SPLR 1 and SPLR 2 switch-lights illuminate in this situation?
The captain controls spoilers and the FO controls ailerons. The pushlights will not illuminate, they illuminate if a jam occurs.
What is different about the spoilers above 140kts?
The outboard spoilers are locked out.
When do the ROLL SPLR INBD or ROLL SPLR OUTBD caution lights illuminate individually?
If one set of spoilers gets stuck/jammed.
What is the source of hydraulic pressure for the rudder?
Both main hydraulic systems
What effect does airspeed have on rudder hydraulic pressure (200/300)?
Hydraulic pressure is limited to 900PSI above 150kts(300), 140kts(200) and is 1500PSI below
What happens if a rudder control system jams? Is there an airspeed reduction?
RUD 1/2 pushlight would be pressed and speed limited to maximum 200kts.
When is rudder deflection restricted?
The rudder is limited to 12deg deflection both ways at flap 0, full rudder operation at flap 15 or greater. (18R, 16L)
Is there a gust lock for the rudder? What flight controls are locked when the CONT LOCK handle is pulled to the lock position?
Ailerons and elevator are locked by the cont lock, it also limits NH to 84%. The rudder doesn’t have a lock.
How is rudder trim applied?
The rotary switch on the centre console. there is a fast and slow function depending on deflection of the switch. rudder can be trimmed up to 10deg from set position.
How is elevator trim normally applied?
Trim wheels either side of throttle quadrant.
When is the standby elevator trim system used? How is it applied?
The standby trim is applied by switching the guarded switch. the toggles on the pilot’s side console use the autopilot trim servo to trim the tailplane.
What can you do if a jam occurs in the elevator system?
The pitch disconnect can be pulled which will allow each pilot’s control column to control their respective side elevator.
What hydraulic system powers the flaps? With the flaps retracted how many degrees left / right is rudder travel restricted to?
No. 1 hydraulic system. 12Deg either side.
How is the solenoid shutoff valve opened? How long is hydraulic pressure available to the flaps?
The flap selector lever sends a signal to the solenoid and this remains open for 70 seconds.
What brings on the FLAP POWER caution light?
If the hydraulic pressure is less than 1500PSI, or the valve is open greater than 70seconds.
What will bring on the FLAP DRIVE caution light?
If the primary flap drive fails.
How many stall warning systems are there? Does flap position have any effect on stall warning?
2 stall warning systems which compensate for flap.
What indication is there of stall warning computer failure?
L/R stall warn caution light will illuminate aswell as the master caution.
If a stall warning computer fails, will the system still operate 200/300?
Yes(300)
What will be the flight deck indication of a jammed aileron cable?
The control wheel will not rotate.
What does a ROLL SPOILER INBD/OUBD HYD caution mean?
Loss of pressure to the respective spoiler.
