Automatic Flight / FMC Flashcards
How do you re-engage the auto throttles when the pitch mode is VNAV / FLCH SPD when the A/T flight mode annunciation is blank
- Cycle the A/T ARM switch to OFF then back to ARM
How do you re-engage the auto throttles when the pitch mode is ALT, V/S or G/S
Push the SPD switch
How could you select climb thrust after takeoff or go-around?
- at the programmed thrust reduction altitude or flap setting the FMC changes the reference thrust to the armed climb limit
- for manual CLB selection press THR switch
What speed is set in the IAS/MACH window and the PFD when power is first applied to the airplane
200kts
The outer Bank Limit selector applies which roll mode?
HDG SEL
When the LOC course is captured what is displayed in the Heading window
LOC inbound course
How can you de-select the approach mode AFTER localizer and glide slope captured
- TOGA
- Autopilot and both FD switches OFF
With the APP switch pushed at what intercept track angle does the AFDS capture the LOC
- 120deg of LOC course
At what alt are the autopilot systems powered by seperate sources with 3 autopilots engaged
Below 1500ft
Can the glide slope be captured prior to LOC intercept
No, G/S inhibited until LOC capture (and intercept w/n 80deg of LOC course
What does an amber horizontal line displayed through the affected ACTIVE pitch or roll mode indicate
A flight mode fault is detected
How many pushes of the autopilot disengage switches on the control column would you make to disengage all autopilots
One to disengage
Second push clears the warnings
When the TO?GA is pushed for go-around on approach what auto throttle mode would be displayed on the flight mode annunciation, if the A/T is armed?
THR
What climb rate is achieved during a go-around with TO/GA pushed
2000fpm
What auto throttle mode is activated with the second push of the TO/GA switch
THR REF (full Go-around mode)
What AFDS status annunciation displays above the attitude display on the PFG when the autopilot i engaged
CMD
When does VNAV activate
400ft above the runway elevation on Take off
When is VNAV deactivated
When another pitch mode becomes active
- FLCH, V/S or ALT
- G/S capture
What auto throttle flight mode annunciation would you have when using FLCH SPD in a descent to include subsequent altitude capture
THR -> HOLD in descent
When altitude captured HOLD -> SPD
When power is first applied to the airplane what altitude is displayed in the MCP altitude window and the PFD
10,000ft
How are autothrottle roll and pitch mode changes emphasized on the FMA’s
Green box around the mode for 10 seconds
Will the autothrottles operate if you dont push TOGA for takeoff by 50kts? If not will they operate?
- No
- the autothrottles will automatically engage above 400ft when VNAV captures
How can you disarm VNAV, LNAV, LOC and APP modes when armed
Push to deselect
Which PFD annunciation is associated with a fail operational automatic landing?
Which is fail passive?
LAND 3 - fail operational
LAND 2 - fail passive
Which pitch mode does not provide autothrottle speed protection
V/S mode
When does LNAV activate when armed
- 50ft above the runway on T/O
- w/n 2-1/2 miles of course
When does rollout mode activate
Below 5 ft
What controls are used by the AFDS to steer the airplane on the localizer centerline after touchdown
Rudder and nosewheel steering
What initial pitch attitude is commanded by the flight director when the flight director is turned on on the ground
8deg
Inflight when is TO/GA armed
Flaps out of UP or G/S capture
If a VNAV descent is initiated prior to T/D what is the pitch mode
VNAV SPD
Describe the condition that would cause VNAV ALT to display th pitch mode?
A conflict exists between the VNAV profile and the MCP altitude
When does flare mode activate during auto land
50ft RA
When do the autopilots start the flare maneuver
50ft RA
When do the autothrottles retard to idle during the the auto land?
25ft RA
When does FLARE de-activate
At touchdown
During autoland what action disconnects the autothrottles
Thrust reverser lever is raised to reverse idle
What conditions would cause the autothrottles to disconnect and subsequently cannot be reconnected
- both FMC fail
Or - two or more engines shut down
Can the autothrottles be reconnected if the FMC master switch is switched
Yes
During takeoff, when TO/GA is selected which autothrottle mode is active
THR REF mode
When does the autothrottle annunciation change to HOLD during takeoff
At 65kts indicated airspeed
When is barometric altitude recorded by the FMC during takeoff
As the aircraft accelerates through 100kts
At liftoff with TO/Ga as the roll mode what roll command is maintained
Ground track at lift off
If an engine failure occurs on the ground what is the pitch command target speed at liftoff
V2 to V2+10kts
At acceleration height what speed commands are established by pitch as the flaps are retracted
5kts below placarded speed of commanded flap position
- flaps up accelerates to VNAV climb speed which is greater of Transition speed (usually 250kts) or Flaps up manuvering plus 20 (VREF+100kts)
When is TO?GA mode terminated after takeoff?
- either when the pilot manually selects another pitch or roll mode, or when the armed LNAV/VNAV mode becomes active during the climbout
- roll mode changes to LNAV climbing through 50ft or HDG sel through 400ft pitch mode changes to VNAV through 400ft
When does the autopilot control the rudder during multi AP approaches
Below 1500ft
At what two altitudes will runway alignment occur during multi A/P approaches during crosswinds with all engines
- 500ft
- 200ft
How does the A/P maintain runway alignment if an engine failure occurs
- Prior to approach
- during multi A/P approaches? If during an approach
- AFDS introduces a slide slip at 1300ft agl
- wings level is established when engine failure is detected
What pitch is commanded by the AFDS when TO/GA is pushed in a windshear recovery on approach
Pitch up if 15deg or slightly below pitch limit indicators which ever is lower
How does the automatic flight control system provide stall protection
Prevents speed reduction below the minimum maneuvering speed
Describe the flight envelope speed protection
AFDS provides stall and overspeed protection
What speed protection margin is used by the AFDS in max operating, flap placard speed, and gear extended speeds
- FMC provides min and max speeds for auto flight
- minimize transient speed overshoots of: maximum operating, gear extend, or flap placard
- undershoot of flaps extended minimum speed
- FMC uses a 5kt margin
What two conditions prevent the AFDS and autothrottle from providing speed protection
- V/S mode active
- Engine failure above maximum engine out alt
