Flight Controls Flashcards by Roberto Oliveira

Flight Controls subjects are

Fly by wire, Flight Control surfaces, slats and flaps, controls and indications, flight control computers FCC

How well did you know this?

Not at all

Perfectly

Flt controls are ______________ controlled and ________________ actuated

Electrically / hydraulically

How well did you know this?

Not at all

Perfectly

The THS Trimmable Horizontal Stabilizer is mechanically linked to

Cockpit controls should a temporary, complete loss of electrical power occur

How well did you know this?

Not at all

Perfectly

The two hand wheels mechanically control

THS

How well did you know this?

Not at all

Perfectly

There is no _________trim

Aileron

How well did you know this?

Not at all

Perfectly

A/P , sidestick input F/CTL computes flight control surface actuators

________ FCC . 1 is capable of controlling the aircraft.

How well did you know this?

Not at all

Perfectly

3 PRIM (Flight Control Primary Computers) actuate:

Normal, Alternate and Direct control laws; speedbrake and ground spoiler control; protection speed computation; rudder travel limit

How well did you know this?

Not at all

Perfectly

2 SEC computers; flight control secondary computer (FCSC) actuate:

Direct control laws including yaw damper function; Rudder trim and rudder travel limit

How well did you know this?

Not at all

Perfectly

3 PRIM / 2 SEC = 2 FCDC (Flight Control Data Concentrators) = acquire data signal = CMC

Central Maintenance Computer

How well did you know this?

Not at all

Perfectly

If 1 computer is unable, another executes, except

Spoiler control

How well did you know this?

Not at all

Perfectly

If all PRIM fail, each SEC becomes

Its master and controls its surfaces

How well did you know this?

Not at all

Perfectly

Sidesticks become active when ________ power is available

Hydraulic

How well did you know this?

Not at all

Perfectly

Simultaneous inputs by Captain and F/O are

Algebraically summed

How well did you know this?

Not at all

Perfectly

After first engine is running, sidestick position

Indicator is on PFD

How well did you know this?

Not at all

Perfectly

PFD = + combined sidestick order and > Max sidestick deflection

How well did you know this?

Not at all

Perfectly

Two sidestick pb handgrip:

A/P disconnect/ sidestick priority pb ; ptt pb

How well did you know this?

Not at all

Perfectly

If held for at least ____ seconds, the other sidestick is latched out and takeover pb can be released without losing priority

How well did you know this?

Not at all

Perfectly

To reactivate sidestick,

Press takeover pb

How well did you know this?

Not at all

Perfectly

Max elevator deflection

30º up 15 ºdown

How well did you know this?

Not at all

Perfectly

Max THS deflection 14º up

2ºdown

How well did you know this?

Not at all

Perfectly

Two electrically controlled hydraulic servojacks are fitted on each

Elevator

How well did you know this?

Not at all

Perfectly

Servojacks 3 modes are

Active = electrically controlled; damping = follows surface; centering = hydraulica maintained in neutral position

How well did you know this?

Not at all

Perfectly

Normal – 1 active and 1

Damping (some maneuvers can cause it active)

How well did you know this?

Not at all

Perfectly

If active servojack fails, damped becomes

Active and dialed damping

How well did you know this?

Not at all

Perfectly

If servojacks are not ___________/__________ controlled, switched to damping

Electrically / hydraulic

If ____ elevator servojacks not electrically controlled , automatically centering mode

Elevators by PRIM 1 – left and right elevators driven by

Green hydraulic jacks

If PRIM 1 fails, PRIM 2 assumes through

blue and yellow hydraulic jacks.

If PRIM 1 / PRIM 2 unavailable

Pitch control SEC 1 / PRIM 3 THS control

PRIM 1/2/3 fail

SEC elevator THS 0 (lost control)

Elevator indicator partially boxed amber if electrical failure detected by

PRIM

Blue or yellow hydraulic power available – mechanical control by

Cable of THS

If three PRIM fails, electrical control of

THS is lost

Ailerons max deflection

25º. Spoiler max deflection 35º.

Aileron droop =

Ailerons deflected when flaps extended

Each aileron servojack has two control modes

Active / damping

The system automatically selects Damping mode if _______ and _______ or ______ and _______ low pressure, or if respective computer fails

Green / yellow or blue and green

At high speed more than ____ kt in Conf 0 – outboard ailerons = 0 deflection

190

In A/P or in some failures, outboard ailerons up to ____ kt

300

If RAT only – outboard ailerons in

Damping – reduce hydraulic power consumption

Spoilers automatically retracted to

Zero if fault or loss of electrical control

Spoiler retains deflection at time of loss, or lesser deflection if aerodynamic forces push it if system

Loses hydraulic pressure

Roll control is achieved by ____ ailerons and ____ spoilers on each wing

Two / five

Yaw control on a single rudder surface, actuated by

3 independent hydraulic jacks (each by different hydraulic system)

Max rudder deflection is

+- 35º

PFTU

Pedal feel and trim unit

PRIM 1 = yaw damping and

Turn coordinator

No feedback to rudder pedals from

Yaw damping / turn coordination

In case of total electrical failure or loss of rudder control, flight control computers failure, Backup Control Module (BCM) controls

Yellow hydraulic jack or Blue (if yellow not available)

Rudder trim is

Manual flight

Rudder trim is ___/second in clean configuration

1º

Manual flight ____ authority of max rudder deflection ___ degrees

85% / 29

The BCM provides this amount of control of the rudder in case of total electrical failure:

Direct rudder command and yaw damping

The pilot can in manual flight apply rudder trim from the

RUD TRIM rotary sw on the pedestal: authority 85% of max rudder deflection limited to 29º

Spoiler max deflection 1 = 25º and 2 to 6=

30º

Speedbrakes inhibited if active

Maneuver load alleviation MLA; angle of attack protection; low speed stability; at least one thrust lever more than MCT; A.FLOOR

Speed brakes can be reset again___ sec after lever reset

Message SPEED BRK when speed brakes are extended

From 1,500 ft after takeoff until landing

Message SPEED BRK green / flashes amber

At least 1 engine idle; speed brakes extended during takeoff roll until reaching 1,500ft after takeoff

RTO > 72 kt spoilers armed – extend – idle / not armed

Extend at least 1 reverse other idle

GND SPLRS partially extend when reverse on at least

1 engine (other at idle) and 1 main gear compressed

The ground spoilers automatically extend during RTO >

72 kt

When speed brakes are selected, spoilers

1 to 6 are activated

Within_______________, which determine how aircraft flight control surfaces should be positioned

FCCs – control laws

Active Normal Law = all flight control surfaces function even after certain

FCC, hydraulic, electrical faults

Normal law protections:

Load factor limitation, pitch attitude, angle of attack, high speed, bank angle protections, and low energy warning, and also maneuver load alleviation

THS automatically set at ____degrees up until reset for required takeoff

Rotation maneuver in Direct Law with full

elevator authority

5 seconds blend ground mode in normal law – 5 seconds -

Flight mode

Normal law flight mode is a load factor demand law with

autotrim and full flight envelope protection.

Pitch normal law – sidestick neutral and wings level -

1 G

Sidestick forward – load factor – increases / aft – load factor -

Decreases

Pitch trim automatic

Manual / A/P

Frozen automatic pitch trim:

Manual trim order; radio altitude < 100ft for flare; load factor < 0.5 g; high speed protection

Normal turns – up to ___ degrees bank, don’t hold back for keeping altitude

Establish a turn ,

release to neutral

Flare mode =

Direct stick to elevator relationship, with some damping by load factor and pitch rate feedbacks

At 50 ft – slight pitch

Down – pilot moves sidestick rearwards to maintain constant path = reproduce conventional aircraft aerodynamic characteristics

Once the aircraft is flying the required trajectory, or flight path, the sidestick can e release to

Its neutral position, and the aircraft will maintain 1g

The flight mode changes to flare mode at

Landing when passing 100ft. Flare mode is a direct stick to elevator relationship

Pitch normal law protections:

Load factor limitations, pitch attitude, angle of attack, high speed, low energy warning

Pitch normal law – sidestick – load factor limitation-

F/CTL computes – slats + 2.5g to -1 g / extended +2.0g to 0g

ECAM – G LOAD - > 1.4g or

< 0.7g

Pitch attitude ___ up / ____ up low speed / ______ down

30º / 25º / 15º

Pitch limits on PFD =

Green – PFD declutter > 25º up < 13º down

PFD V(red) >

30ºup – PFD normal between 22ºup and 10ºdown

Low end of speed = alpha -

Max lift attained

Conventional aircraft = stick shaker / A330 normal law – alpha= alpha protection -

System switches the elevator control from normal mode to protective

Protection mode =

Angle of attack proportional to sidestick deflection

Alpha max =

Maximum angle of attack available normal law < theoretical maximum

In the range between alpha protection and alpha max, sidestick

Commands alpha directly. A/P disconnects if Alpha Protection is active

Alpha protection, alpha max and A.FLOOR vary according to

Weight and configuration

Alpha prot and alpha max = flight computer =

PRIM

A.FLOOR – PRIM – activated through

A/Thrust system

Fly lower alpha protection-

Sidestick rearwards (protection)

If sidestick released angle returns

To alpha protection and stays there

Critical angle – A.FLOOR by A/Thrust system. A/Thrust commands

TOGA regardeless of lever position

A/Thrust armed or off engages TOGA when

Angle> threashould in acceleration config; ground speed variation; difference G/S and IAS; sidestick > 14º pitch ; attitude >25º; AOA is active

Exit AOA protection if

Pushed > 8º fwd; pushed > 0º fwd at least 1 sec (alpha < angle max); neutral or pushed fwd (angle

Exit A.FLOOR

Message TOGA LK on FMA

To cancel TOGA LOCK, thrust lever

reduced to thrust required to press A/THR instinctive disconnect pb

PFD VLS , Vangle Prot

Top of amber and black; V angle max top of red

VMAX – automatic – AP off,

Pitch trim frozen and positive spiral static stability, so release sidestick, aircraft wings level

Vmax prot =

Bank limit from 67º to 45º

High speed protection symbol =

Green at VMO + 4kt

Between 2,000ft and 100ft SPEED,SPEED,SPEED computed by PRIM’s with inputs

Aircraft config, airspeed deceleration rate, flight path angle