Auto Flight Flashcards
How does the autopilot move the flight control surfaces?
Fly-by-wire
aileron, flaperons, spoilers, elevators
What is the progression in communication from the autopilot
Autopilot
Primary flight computers PFC’s (Autopilot commands to flight commands)
Actuator Control Electronics ACE’s
Actuators
Where does the feedback to the flight controls come from?
Backdrive is generated by the PFC to the backdrive actuators
What are the Auto Throttle Modes
HOLD IDLE SPD - Speed THR - Thrust THR REF - Thrust Reference
What approaches have autoland capability
ILS and GLS
What is IAN
Integrated Approach Navigation
What is the MCP
Mode control panel
What do you see when you test the F/D switch on the preflight?
TO/GA | TO/GA
FLT DIR
Pitch 8 deg
Roll centered
(Green on both the FMC and the HUD)
What indicates a mode change?
Green box around mode for 10 sec
what is FLCH
Flight level change
What is the min alt for Vnav mode?
> 400 AGL
At what altitude does the APP mode not disengage by selecting another mode
1,500 AGL (RA)
What are the default modes for Roll and Pitch
Roll - HDG HLD or TRK HLD
Pitch - V/S or FPA
What is the only way to disengage the LOC/GS (APP) below 1,500 ft
disconnecting the AP and turn off the FD
or TO/GA switch
What do yo set in the MCP during the preflight
V2 speed
DG after T/O
ALT
What can be UL
airspeed
DG
ALT
can be uplinked
What moves the UL to the upper window
XFR - Transfer
What is the ASA
AFDS Status Annunciator
displayed just above the attitude indicator
FLT DIR, A/P, LAND 3, LAND 2, NO AUTOLAND
What does each ASA mode mean
FLT DIR - FD and A/P engaged
A/P
LAND 3 - Full autoland even with a single fault
LAND 2 - Autoland even with a single fault
NO AUTOLAND - unable to make a autoland
What are ways to disconnect the A/P
button on Yoke
bar on MCP
force on control column
Rudder pedals force during LAND 3 or 2
How is a degradation of a Mode indicated
a Yellow line through the affected mode
removal of the respective steering bar on FD
What is the difference between LAND 3 and LAND 2
LAND 2 allows a level of redundancy that a single fault cannot cause a significant deviation from the flight path
LAND 3 allows a level of redundancy that a single fault cannot prevent the A/P from maning and automatic landing
When are EICAS aural alerts inhibited
On T/O below 200 ft
all messages not affecting safety of flight
On the Ground, during preflight, when either flight director switch is selected on …
FLT DIR and steering bars are displayed on the onside PFD and TO/GA is displayed on the FMA roll and pitch windows on both PFD’s
Can the A/P be engaged on the ground with flaps extended
no
How do we control the A/T
MCP and CDU (Control Display Unit)
CDU - Lower MFD - CDU
What are the 4 ways to engage the A/T
TO/GA < 50 kts with flap > 0
A/T switch >400 ft
FLCH - in flight
VNAV - in flight
What does it mean if you see
L SPD | HDG SEL | ALT
in the FMA
L SPD only Left A/T is engaged at speed mode
When will the A/T automatically engage
A/P disengaged and FD are turned off
A/P or FD on and in VNAV, FPA, V/S, ALT, G/S and:
speed is less than FMC for 1 sec
thrust is less than the Ref Thrust
When will A/T not automatically engage?
Pitch mode - FLCH or TO/GA
< 400 ft on T/O
< 100 ft on LDG
at slow speeds what will cause the A/T to increase the thrust?
Vma or MCP speed set
which ever is greater
After manual A/T disengagement how can you reselect?
A/T
FLCH
VNAV
TO/GA
When will A/T disconnect occur
Reverse raised to reverse idle
over ridden during manual landing
Fault
both eng shut down
THR REF
Used in T/O and VNAV climbs
REF - the set limit in EICAS
THR
Used in FLCH and TO/GA
Used to maintain vertical speed required by the pitch mode
SPD
Used in Level flight
targets the speed set on the MCP
will not exceed VMO, MMO, Flap, Slat, Gear speeds
IDLE
Used in VNAV PTH descent
IDLE changes to HOLD when thrust levers reach idle
When in VNAV mode where do we change the speed
CDU
How do you quickly override the VNAV speed set in the CDU
push the Speed selector button and the IAS speed will appear, adjust as required
(pressing it again will blank the IAS and return contorl to the VNAV and CDU)
During landing automatic or manual landing IDLE power will be set Aprox…
25 ft
Which autothrottle mode with not reposition the thrust levers after the pilot has manually moved them?
HOLD
If the FD switches were missing during preflight when can the TO/GA be engaged
> 80 kts by pressing the TO/GA
Below 50 kts the only function of TO/GA switches is A/T engagement
What is the target of TO/GA just after lift off
< 5 ft - Wings Level
> 5 ft - Ground Track
When does HUD guidance become active?
Runway centerline
HDG within 45 deg
When is TO/GA armed in flight?
Leading edge slats extended
G/S captured
(indication on the EICAS GAin green above N1)
When can the LNAV and VNAV be armed for T/O and when is it engaged?
LNAV Before T/O
50 ft
VNAV 400 ft
What is FAC on the LOC/FAC button
Final Approach Course
For Non ILS approaches
What is the max LOC/FAC intercept
120 deg
same for B/CRS
When does ROLLOUT mode automatically arm?
And Engages?
< 1,500 ft
Autoland 2 or 3 annunciated
engages with WOW
How do you turn on the TO/GA mode on the ground?
turn on either FD Switches
What conditions will arm the TO/GA mode in flight
Slats extended or G/S capture which ever comes first
How far away will the LNAV capture the active leg
2.5 nm
in windshear what does TO/GA target?
15 deg nose up or just below the pitch limiter which ever is lower
on eng fail after T/O what does TO/GA target
before lift off - V2 or rotation speed which is grater
after lift off - V2 or current airspeed which ever is greater
What will change the target airspeed during windshear
if current speed is above selected speed for > 5 sec it becomes the new target
(up to target +25)
What happens to the modes if you hit TO/GA after lift off
clears:
LNAV
VNAV
A/T goes to THR REF
What rate of climb does the TO/GA pitch mode require
2,000 fpm
In a GA what does a 2nd push of the TO/GA do
changes A/T mode to THR REF and FULL power is available
removes LNAV
AT TO/GA level off what speed is targeted after level off
Flap placard - 5 kts
250 kts if flaps up
target speed in IAS if set after TO/GA pressed
What are the 3 VNAV modes
VNAV SPD
VNAV PTH
VNAV ALT
When does the MCP altitude not change the FMC altitude?
50 nm to TOD
What are the V/S and FPA limits
- 8,000 to + 6000 fpm
- 9.9 to + 9.9
What does the Altitude HOLD switch do?
Hold present altitude
What is Flare mode
Mode available in LAND 2 or 3
brings to a smooth and automatic land and touchdown
Armed 1,500 ft displayed on FMA under G/S
engaged at 50 ft
thrust to idle at 25 ft (IDLE in FMA)
What is Autopilot Flight Envelope Protection and what are its indications?
protection against:
Stall
Overspeed
Bank Angle
(EICAS - AUTOPILOT, yellow line through Vertical and lateral modes)
That is the A/T thrust mode after the first push of the TO/GA switch during the GA
THR
