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From Flashcardlet > FCOM VOL2 Flight Instruments And Displays. > Flashcards

FCOM VOL2 Flight Instruments And Displays. Flashcards

1
Q

What does the amber band on the high end of the airspeed indicator mean?

A

Maximum manoeuvre speed/ high speed buffet.
This airspeed provides 1.3g manoeuvre capability to high speed buffet.
(1.3g=40degrees aob).

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2
Q

When will the top Amber band appear?

A

At high altitudes and high weights.

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3
Q

When will the white current Mach/groundspeed change from groundspeed to Mach number?

A

Mach .40

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4
Q

In vnav path what does the bottom magenta band below target speed do?

A

Autothrottle wake up speed.

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5
Q

What does the top of magenta band above target speed do in vnav path?

A

Point at which it will change from vnav path to vnav speed.

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6
Q

On t/o what does the white bug indicate?
When is it removed?
What is it’s significance?

A

V2 + 15.
Removed When either of the following occurs
-flaps retracted
-VREF entered.
During engine failure Below this speed limited to 15’ aob,
at v2+15 max aob 30’.

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7
Q

What is the minimum manoeuvre speed mean?

A

Amber band on low side of airspeed indicator.
Min manoeuvre speed,
- Below 20000ft means 1.3g until stick shaker
- Above 20000ft means 1.3g until low speed buffet

(1.3g = 40 degrees aob).

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8
Q

Min speed is indicated by what?

What happens at this speed?

A

Red and black bricks

Stick shaker.

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9
Q

On approach what does the White bug indicate?
When is it displayed?
What is the significance of it?

A

Vref40+20
When a valid VREF is entered
If an engine failure on finals and elect to use flap15, vref40+20 is the vref15 speed

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10
Q

When are the Amber pitch limit bars displayed?

A

When flaps are not up.
When at low speeds with flaps up.
Tip: use the pitch limit bars during upset recovery to prevent secondary stall.

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11
Q

When will the skid slip indicator, fill White, turn Amber?

A

When at full scale deflection for White.

Amber when aob 35’ or more will fill Amber when also full scale deflection.

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12
Q

What does the red and black markings at the top end of the airspeed indicator?

A 
Maximum speed,
The bottom of the bars can be either 
- VMO/MMO
- landing gear placard speed
- flap placard speed.
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13
Q

When will the IAS disagree flag appear?

A

When capt’s and FO’s airspeed disagree by 5 or knots for 5 secs or longer.

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14
Q

What does the Amber “Spd Lim” flag on PFD indicate?

A
  • If the stick shaker warning has failed the lower red and black bricks are removed from ASI.
  • If the maximum operating speed has failed the upper red and black bricks are removed from ASI.
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15
Q

What does the Amber “displays control panel” flag on PFD indicate?

A

A failure on the EFIS control panel. The side displaying the flag is the one which has failed.
Control panel switch to all on 1 or 2, the failed side is then controlled through the other EFIS control panel.

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16
Q

When will the Amber alt disagree flag appear?

A

When both capt’s and FOs altimeters disagree by 200ft or more for 5 or more seconds.

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17
Q

When will the Amber pitch and roll comparator flags appear on PFD?

A

Pitch when capt’s and FO’s pitch angles differ by 5’ or more.

Roll when capt’s and FO’s roll angles differ by 5’ or more.

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18
Q

On the VSD how high is red terrain display above a/c?

A

2000ft and above

19
Q

How high is Amber terrain on VSD above a/c?

A

500ft-2000ft above a/c, with gear down- 250ft-2000ft above a/c.

20
Q

How high is green terrain on VSD?

A

More than 500ft below a/c. With gear down more than 250ft below a/c.

21
Q

What does the PWS flag on Nav display indicate?

A

Predictive windshear alerting and display have failed.

22
Q

DEU 1 powers which displays?

A

Capt’s outboard and inboard and upper display unit.

23
Q

Deu 2 powers which displays?

A

FO’s outboard inboard and lower display units.

24
Q

What sort of screens are the 6 main displays?

A

Liquid crystal displays LCD.

25
Q

If an outboard display fails and automatic switching occurs what is displayed where?

A

PFD moves to inboard display.
Outboard display blanks, Nav display can be displayed on
lower DU.

26
Q

What happens when inboard DU fails and automatic switching occurs?

A

Inboard DUblanks

27
Q

What are the major components of the “AIR DATA INERTIAL REFERENCE SYSTEM”?(ADIRS).8

A
  • 2 X ADIRUS
  • 4 X air data modules
  • 1 X inertial system display
  • 1 X dual mode select unit
  • 6 X static ports
  • 3 X pitot probes
  • 2 X alpha vanes
  • 1 X TAT probe.
28
Q

What is the basic purpose of the ADIRU’s?

A

Provides inertial track and position data to FMC’s as well as airspeed, attitude and altitude to the displays.

29
Q

What are the inputs to the air data modules (ADM’s)?

A

4 static ports, 2 pitot probes.

30
Q

What is the purpose of the alternate static ports and pitot probe?

A

Provide inputs to the standby instruments

31
Q

What side does the ADMs supply the ADIRUs ?

A

The ADMs inputs from the on side pitot probes and supply the onside adiru, so left ADMs supply left adiru and right ADMs supply right adiru.

Note: ADMs convert pnuematic air pressure to electric signals and send this data to ADIRU’s.

32
Q

How is TAT computed?

A

Temp measured by the temp probe is sent to adiru for computation of TAT.

33
Q

Where does static air temp SAT come from?

A

ADIRU’s using tat probe info.

34
Q

What standby flight instruments are on board?

A

Magnetic compass

ISFD.

35
Q

Where does the ISFD receive its inputs from?

A 
Attitude-internal inertial sensors
Airspeed- auxiliary pitot ( direct link)
Altitude- alternate static ports ( direct Link)
ILS- Nav head 1
Magnetic heading-ADIRU 1
36
Q

Which bus powers the ISFD?

A

Battery bus. Goes through initialisation once battery is switched on.
Takes about 90secs.

37
Q

How does the clock keep time when a/c is powered down?

A

It’s uses 28v DC standby power when reqd.

Note: screen is blank but time kept.

38
Q

How long does the DFDR hold data for?
Where is it located?
How long is the location beacon operable for?

A

Can record previous 25hrs of flight data.
Located in sealed container behind access door aft cabin
30days

39
Q

What protection does the HUD have for the combiner in wrong position?

A

In IMC and vmc modes if combiner not in correct position “align hud” msg appears on combiner.

40
Q

What is indicated by a DEU failure above FL220?

A

Amber display source, autopilot and FD’s unaffected.

41
Q

What happens if you get a DEU failure in a climb or descent below FL220 with autopilot on failed side engaged?

A

Amber display source.
FDs pitch CMD bars are removed from both sides
Autopilot pitch mode re-engages in CWS pitch,
FDs pitch bar reappears in alt Aquire,
LVL Change, VS, VNAV not availe with failed side autopilot engaged.

42
Q

What happen with DEU failure in level flight below FL220

Autopilot engaged on failed side?

A

Climb or descent to new alt is only possible in cws pitch.

43
Q

What happens on app above 400ft with DEU failure?

What happens when DEU fails before 2nd AP is engaged?

A

FD pitch and roll command bars removed from the display on the failed side.

Engagement of 2nd autopilot inhibited.

From Flashcardlet (20 decks)

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