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Kalitta Air B777F > Systems - Flight Controls > Flashcards

Systems - Flight Controls Flashcards

1
Q

How many Primary Flight Computers are there?

A

3

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2
Q

With the switch in the AUTO position, what flight control mode should be active?

A

Normal or the next per system logic

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3
Q

How can the flight control mode be confirmed?

A

FLT synoptic page and EICAS MSG

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4
Q

What are the three flight control modes?

A
  1. Normal
  2. Secondary
  3. Direct
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5
Q

What envelope protections exist in the normal mode?

A
  • Overspeed
  • Stall
  • Bank
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6
Q

Is envelope protection available in the Secondary or Direct modes?

A

No

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7
Q

Is TAC available in Secondary or Direct modes?

A

No

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8
Q

Define Envelope Protection.

A

-A/T spool up for stall and elevator trim feel
-Overspeed elevator trim feel
-Bank yoke feel and force to return inside 30 degrees

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9
Q

The 777 provides visual, aural and tactile cues during envelope exceedances. What happens during an overbank?

A
  • “Bank angle, Bank angle” aural warning
  • yoke feel in opposing direction
  • amber pointer
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10
Q

What are the principal differences between the Normal and Secondary or Direct modes?

A

GENERAL
* Normal all functions operate normally
* Secondary no envelope protections, no TAC, no A/P, no gust suppression, no auto speedbrakes, no tailstrike protection, yaw dampening degraded or lost, no wheel rudder crosstie.
* Direct all functions lost flight controls respond directly

PITCH
* Normal pitch elevator feel is variable based on trim speed
* Secondary and direct pitch compensation is lost and trim directly moves the elevator, flaps out=less feel force, flaps up=greater feel force

ROLL
* Normal spoiler 5 and 10 are locked out at high speed, 4 and 11 are mechanical
* Secondary and Direct spoilers 5 and 10 are ALWAYS locked out

YAW
* Normal Rudder ratio auto controls rudder movements based on speed
* Secondary and Direct rudder ratio is based on flap position Flaps up= less response, Flaps down= greater response

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11
Q

What would an illuminated DISC light indicate?

A

PFC has been disconnected manually or automatically and the system is in direct mode

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12
Q

How is stall protection achieved?

A

Elevator feel force is greater in the nose up direction, autothrottles spool up to maintain min maneuvering speed based on trim reference

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13
Q

How is overspeed protection achieved?

A

Elevator feel force is greater in the Nose down direction.

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14
Q

When does the wheel to rudder cross-tie operate?

A

In flight between 70 and 210 knots

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15
Q

What flight control mechanical backup capability exists?

A

Spoiler panes 4 and 11 cable linked to yoke, along with ALTN trim levers cable linked to stab trim control module

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16
Q

Which unit receives the pilot control orders directly?

A

ACES

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17
Q

How many modes of flap operation are there?

A
  1. Primary
  2. Secondary
  3. Alternate
18
Q

In the primary mode, when will flap trailing edge load relief work with excessive speed?

A

Flap positions 15-30

19
Q

What are the differences between the three flap modes?

A

Primary
* Hydraulically driven with normal sequencing via Flap lever to FSEU’s
* Flap load relief positions 15-30, Autoslat armed 1-20, assym and uncommanded motion protections

Secondary
* Electrivally driven with altered sequencing also via Flap lever to FSEU’s
* Expanded indication on EICAS, normally slats extend to full range at all flap selections unless speed is >256kts, then slats extend to mid range, <256kts flaps extend to full (slat degraded load relief), assym and uncommanded motion protections

Alternate
* must be manually selected and is Electrically driven via ALTN flap selector switch
* Expanded indication on EICAS, slats and flaps extend simultaneously limited to slat mid range and flap 20 degrees. No reliefs are awarded.

20
Q

Upon establishing AC electrical power at the gate, you move the flap lever to position 20, will the flaps move?

Why?

A

No.

Flaps would have to move in secondary mode, however secondary mode is inhibited with groundspeed below 40kts, Center Hyd pressure low and external power avail and one engine below 50% N1

21
Q

What is Trim Reference Speed?

A

A calculated speed at which the aircraft would eventually stabilize without control inputs.

22
Q

When is bank angle protection active?

A

In normal flight control mode bank greater than 35 degrees

23
Q

In what modes are Gust suppression and TAC available?

A

Normal only

24
Q

What surface moves when you select flaps 1?

A

Slats only

25
Q

When will slats extend to full position?

A

Beyond flaps 20

26
Q

Which flap positions have flap load relief?

A

In normal mode 15-30

27
Q

Ailerons and flaperons droop at what flap setting?

A
  • Ailerons droop 5-20 to augment takeoff performance
  • Flaperons droop through all settings
28
Q

Explain in basic terms how the fly by wire system works.

A

Inputs to ACEs to PFCs back to ACESs to PCUs

29
Q

Is there a way we can manually select the secondary mode?

A

No happens automatically

30
Q

When the PFC switch is in auto and there are no other malfunctions, what flight control mode are we in?

A

Normal

31
Q

Can we manually select the direct mode?

A

Yes disconnect the PFCs

32
Q

How does the airplane fly in secondary or direct mode?

A

Like a 767 sort of

33
Q

Can you engage the autopilot in either the secondary or direct mode?

A

No

34
Q

There are two sets of computers in the flight control system. What are they?

A

ACEs and PFCs

35
Q

If a failure should occur, would you rather it be ACEs or PFCs?

A

PFCs

36
Q

If all four ACEs are lost, what control do you have?

A

ALTN pitch trim and spoiler panels 4 and 11

37
Q

Will use of the ALT TRIM switch disconnect the A/P?

A

No

38
Q

How can you tell that you are in the flap secondary mode?

A

EICAS expanded flap displays and FLAPS PRIMARY FAIL EICAS MSG

39
Q

What other means do you have to confirm the malfunction?

A

Synoptic page

40
Q

What does an EICAS message FLAPS DRIVE indicate?

A

When the FLAP DRIVE mechanism has failed

41
Q

What will happen if you add power and begin your takeoff roll with STAB not in green band?

A

Takeoff Config Warning

42
Q

How many ways can the stabilizer be trimmed in the 777?

A

Primary via yoke switch, ALTN trim switches

Kalitta Air B777F (18 decks)

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