Automatic flight Flashcards
F/D is off and you engage A/P. What happens?
A/P engages in HDG HOLD or TRK HOLD, or if bank greater than 5 degrees ATT. V/S or FPA as vertical mode.
How can bank angle protection be disabled?
A/P disengage bar.
You arm F/D on the ground. What happens?
F/D arms in TO/GA mode for roll and pitch.
You arm the F/D in flight with A/P disengaged. What happens?
F/D engages in HDG HOLD or TRK HOLD, or ATT if bank is greater than five degrees. V/S or FPA as pitch mode.
You position the F/D to on with A/P engaged in flight. What happens?
F/D engages in the currently selected A/P modes.
What conditions are needed to display F/D steering indications with F/D switches in off?
Speed greater than 80 kts, flaps not up and TO/GA button pushed.
When is CLB/CON switch inoperative?
On the ground and below 400 ft during takeoff.
Pushing CLB/CON will give you…?
Two engines: Thrust to FMC selected climb thrust.
One engine: Thrust limit to CON (max continous)
Pushing A/T above 400 ft gives you?
Appropiate A/T mode for pitch mode, or if no pitch mode, SPD mode.
What are the IAS/MACH window changeover speeds during climb/descent?
0,84M/310kts
What are the criteria for LNAV engagement?
- Above 50 ft
- within 2.5 NM of active leg
- if not within 2.5 NM, on intercept heading, engages when approaching the active leg
You’re in LNAV and pass the last active waypoint. What happens?
LNAV maintains current HDG.
When does VNAV engage during takeoff?
At 400 ft above runway elevation.
Changing from TO/GA to FLCH, what speed will you get in the speed window?
Highest of current and selected speed.
Explain FLCH climb/descend logic.
FLCH gives 500 fpm per 1000 ft of altitude change. Tries to reach commanded altitude within two minutes. If unable, climbs/descends in CLB/IDLE.
What happens when you push HDG/TRK HOLD?
Wings level and holds the HDG/TRK established when wings are level.
Explain BANK LIMIT selector logic.
AUTO varies between 15-25 dependent on TAS. Otherwise selected bank angle is max.
During climb or descent, what happens with every push of the altitude selector?
Deletes next waypoint constraint between aircraft altitude and MCP altitude.
You’re in a climb, with no constraints, and you’re cleared above FMC cruise altitude. How can you transfer the new altitude from the MCP to FMC.
Push altitude selector.
What are the criteria for intiation of DES NOW feature?
MCP below cruise altitude, within 50 NM of T/D, push the altitude selector.
What intercept track angle is required for localizer capture?
120 degrees.
How can LOC be disengaged?
- Roll mode other than LNAV
- TO/GA
- Disengage A/P, turn off F/D
- Push LOC above 1500 ft radio.
LOC captures. Within how many degrees must intercept track angle be for G/S capture?
Within 80 degrees.
How can you deselect APP?
- Push APP above 1500 ft radio
- HDG SEL or HDG HOLD
- TO/GA
An amber horizontal line is displayed through a pitch or roll mode. What has happened?
Flight fault mode is detected.
On ground, below which speed must TO/GA be pushed to activate THR REF? What happens if TO/GA is pushed after reaching said speed?
50 kts. A/T operation is inhibited till 400 ft altitude.
What happens if you push TO/GA above 80 kts on the ground?
LNAV/VNAV disarms.
What happens if you push TO/GA after lift-off?
- Derates and assumed temperature reduction is removed.
- HOLD changes to THR REF
- 50 to 400 ft, selects TO/GA roll mode
- Above 400 ft selects TO/GA roll and pitch
What happens when you push TO/GA on approach with flaps out of up and glideslope captured?
- A/T in THR mode
- TO/GA roll and pitch modes
- No A/P or F/D active, activates THR REF
- Arms or activates LNAV if path is available
What happens with a second push of the TO/GA during GA?
A/T activates in THR REF mode.
When is the only time rudder inputs will disengage the A/P?
Pedals will only disengage the A/P with LAND 2 or LAND 3 annunciated.
How will you recognize a persisting F/D mode degradation?
The affected flight director bar is removed.
What is the ILS Signal Interference Monitor?
The A/P will disregard the ILS signal and engage in a attitude stabilizing mode if short term ILS signal interference is detected.
When is ROLLOUT (armed) displayed? When does it engage?
Below 1500 ft. Below 2 ft.
In flight, when is TO/GA armed? Where is it annunciated?
When the flaps are out of up or at G/S capture.
When does TO/GA pitch and roll guidance become active?
At lift-off.
Where does the AFDS take it’s V2 speed from?
IAS/MACH window.
After lift-off, what does the AFDS command in regards to pitch and speed?
- target speed of V2 plus 15 kts, or airspeed at rotation plus 15 kts, whichever greater
- target speed exceeded for more than 5 seconds, lesser of new speed or V2 plus 25 kts.
- IAS/MACH window speed, if it is changed to a speed greater than target speed
What is the command speed when a go-around is initiated?
Speed window speed or current airspeed, whichever is higher. Max speed window speed plus 25 kts in any case.
When does the CDU scratchpad message RESET MCP ALT display?
MCP altitude set to current cruise altitude and within 2 mins of T/D.
What actions are required to get out of VNAV ALT?
Change MCP altitude and push the altitude selector or change pitch mode.
When does FLARE (armed) display? When does it activate? Deactivate?
Below 1500 ft RA during autoland. Between 60 and 40 ft RA. At touchdown, and smoothly lowers nose wheel to the runway.
What thrust is set with THR REF indicated?
Thrust is set to the selected thrust limit on the EICAS.
What does the A/T mode HOLD indicate?
A/T servos are inhibeted and the pilot can set the thrust levers manually.
Which speed does the A/T mode SPD maintain?
The speed displayed on the PFD.
Explain the logic of the ATT mode.
ATT will mainain bank between 5 and 30 degrees, or if the bank is greater than 30 degrees, return bank to 30 degrees.
What steering indication will TO/GA roll mode maintain?
Present track at mode engagement.
What is the initial pitch indication on the ground when TO/GA is pushed?
8 degrees pitch up.
When does A/T reduce thrust to idle during a manual landing?
At 25 ft, unless FLCH or TO/GA is active.
What altitude does the FMC use to decide when to engage VNAV during takeoff, accelerate for flap retraction and set climb thrust?
The barometric altitude recorded when accelerating through 100 kts.
If an engine failure occurs on the ground, what would be the target speed at lift-off?
V2 or airspeed at lift-off, whichever greater.
When does runway alignment occur?
Corsswinds requiring greater than 10 degrees of crab, at 500 ft. 5 to 10 degrees, intially at 500 ft, then once more at 200 ft. Less than 5 degrees, at 200 ft.
When is a wings level sideslip introduced with an engine failure?
At 1300 ft or when the engine failure is detected.
How can you terminate TO/GA mode above 400 ft?
Select a different roll or pitch mode.
