Flight Controls Flashcards
The primary flight control system is highly redundant with three operating modes. Name them:
Normal, Secondary, and Direct
When armed what activates the thrust asymmetry compensation system?
when engine thrust differs by more than 10% between engines
With the autopilot engaged, using the primary pitch trim switches will ____.
will have no effect, as they are inhibited
The amount of aileron trim is indicated:
on a scale on top of each control column
In the event of a complete electical system shut-down, cables from the flight deck to the stabilizer and Spoilers ____ allow the pi
4 and 11
Some 777-300ERs are equipped with a tail skid system. How is this system activated?
Automatically and uses the main landing gear actuation system.
On the 777-300ER aircraft to protect against inadvertent deployment during cruise, flap and slat extension from the UP position is inhibited when
speed is more than 275 knots or altitude is above approximately 20,000 feet.
Before liftoff, the thrust asymmetry compensation (TAC) system ________________ for the failed engine.
does not fully compensate
In-flight, at what flap settings are Speedbrake operations allowed.
There is no limitation for extension of speedbrakes in a landing configuration.
What are the functions of the PRIMARY FLIGHT COMPUTERS Disconnect Switch in the AUTO position?
The Flight Control System operates in the Normal Mode and system faults automatically cause the system to switch to the Secondary or Direct modes.
In the Secondary Flap/Slat mode on the 777-300ER, because Autoslats are unavailable, the slats are fully extended at all flap positions if airspeed is less than 256 knots.
True
While hand flying the airplane (Normal PFC mode), if we move these switches on the yoke, how does this affect the pitch trim of the airplane and what flight controls move?
Yolk trim switches
The switches change the PFC pitch trim reference speed, prompting the PFCs to reposition the elevators and then streamline the stab. .
In this mode, trim reference speed is changed by yoke pitch trim switch input, which sends a signal to the PFCs to move the elevator and stabilizer to generate the commanded pitch trim. The PFCs also provide ____.
Normal mode
compensation for flap, speedbrake, thrust, and configuration change as well as turns up to 30 degrees of bank
In this flight control mode, the stabilizer motion may automatically move to streamline for thrust and configuration changes. What happens when the airplane is no longer in the normal mode and is in either the secondary or direct mode?
Normal mode
The aircraft no longer has automatic pitch compensation. Changes to thrust or configuration do not cause automatic elevator/stabilizer movement.
Loss of air data will result in the PFCs reverting to the ____ mode.
Secondary
When the PFCs revert to the Secondary mode, ____ will operate in a degraded mode:
Rudder Ratio and Elevator Feel
The degraded mode of rudder ratio and elevator feel provide two settings that are based upon ____.
flap position
During flight, the EICAS advisory HYD QTY LOW C was followed by the caution HYD PRESS SYS C. Checklists were accomplished. Later, while configuring for approach and landing, you get these EICAS cautions as shown. What should you do? (Both 777-200ER and 777-300ER)
Slats Primary Fail
Flaps Primary Fail
Plan for a Flaps 20 Landing and expect slow slat and flap operation.
With the slats and flaps in the secondary mode prior to extension, your landing configuration will be ____.
Flaps 20, slats full
Before configuring, you get the EICAS caution FLAP/SLAT CONTROL. Which of the following statements is true?
There are no protections provided by the FSEUs
TAC is available when ____.
airspeed is above 70 knots
The stabilizer is powered by ____.
right and center hydraulic systems
The takeoff stabilizer trim green band is calculated using:
FMC inputs of CG, gross weight, takeoff thrust and V1