automatic flight Flashcards
when will the FGCS automatically select half-bank? what’s the bank angle?
FL250
17 degrees bank angle
what is FPA?
Flight path angle is a pilot-selectable pitch attitude (in degrees) of climb or descent
FGCS adjusts thrust and pitch to maintain path angle and airspeed
what does TOGA button do?
On ground - activates takeoff guidance cross bars
in flight - activates go-around guidance
what do the takeoff guidance crossbars do?
Maintain extended runway centerline
maintain pitch guidance according to slat/flap setting
When is the TOGA mode deactivated?
another vertical mode is selected
autopilot is activated
TCS button is pressed
When will the FD automatically display?
TOGA button is pressed
autopilot is activated
Windshear detection
What is the function of the TCS button?
allows manual override of the autopilot
when released, airplane maintains new altitude (provided ALT was the active vertical mode) but will return to previously lateral mode (except ILS, Autopilot will recapture the LOC/GS)
What will disengage the autopilot?
AP button on GP is pushed
any manual pitch trim is activated
either AP/TRIM disc button is pushed
stick shaker activated
windshear escape guidance is activated
flight controls in direct mode
aileron or elevator controls disconnected
overpowering the yoke
internal system failures
can the yaw damp be deactivated if the autopilot is on?
yes, it is independent of the autopilot
when willl the auto-throttles engage on the ground? in flight?
on ground - AT TO (GP) is armed & TLA > 50 degrees
in flight - AT (GP) is armed and airplane >400 ft AGL
will the auto throttles compensate for gusty wind conditions?
yes, up to 5 kts.
what will disengage the auto-throttles?
AT (TL or GP) is pushed
TLA difference > 8 degrees
TL at idle with weight-on-wheels or wheels spinning
internal system failures
what is SPDe? what mode uses SPDe?
speed on elevator, thrust is fixed and pitch is adjusted to maintain airspeed (VS changes)
FLCH uses SPDe for climbs and descents
what is SPDt? what modes use SPDt?
speed on thrust, thrust is adjusted to maintain selected airspeed
FPA, VS, GS,ALT, ASEL
what are the AT modes?
SPDe, SPDt, TO, GA, HOLD, RETARD (@ 30 ft RA)
What does LIM and OVRD mean on the FMA?
LIM - the selected vertical mode requires more or less engine thrust than is available
OVRD - the TL are being manually moved (NO AP DISENGAGEMENT)
when is CRZ automatically selected?
when +100 ft of selected altitude for 90 seconds
desired airspeed must be achieved or it will remain in CLB mode
what does teh SRC button do?
selects pilot or co-pilot as the data source for the AFCS
what does the red AP/TRIM DISC button on the yoke do
disconnects the AP
stops all trim actuation if button is pushed and held
what does the PREV button do?
allows the capture of ILS/BC course while still using the FMS as the basic NAV source provided the AUTO TUNE function is enabled on the MCDU and the approach is loaded in the FMS
describe roll mode - 3 different angles
bank angle at or below 6 degrees - AP levels the wings
bank angle from 6 - 35 degrees, AP will hold present bank angle
bank angle over 35 degrees - AP maintains 35 degrees of bank
when does ROLL change to TRACK on takeoff?
IAS greater than 100 kts
bank angle is 3 degrees or below for more than 10 seconds
