FMAs/ASAs Flashcards
(40 cards)
FLT DIR
The flight Director is ON and the autopilots are not engaged.
A/P
The autopilots are engaged.
LAND 3
Three autopilots are engaged and operating normally for an automatic landing. The auto pilot system level of redundancy is such that a single fault cannot prevent the auto pilot system from making an automatic landing.
LAND 2
AFDS redundancy is reduced; in some cases, only two auto pilots are available. The level of redundancy is such that a single fault cannot cause a significant deviation from the flight path (fail passive).
NO AUTOLAND
AFDS redundancy is unable to make an automatic landing.
THR
Autothrottle applies thrust to maintain the vertical speed required by the pitch mode.
THR REF
Thrust is set to the selected thrust limit display on EICAS.
IDLE
Displays while auto throttle system moves thrust levels to idle; IDLE mode is followed by HOLD mode.
HOLD
Thrust levers are disconnected from auto throttle servos. The pilot can set the thrust levers manually.
SPD
The auto throttle maintains the selected speed displayed on the PFD. Auto throttle will not exceed the operating speed limit or the thrust limits displayed on EICAS.
TO/GA (Roll) (On Ground)
On the ground, with both flight directors off, TO/GA engages when the first flight director which is selected ON or when a TO/GA switch is pushed with speed greater than 80 KIAS. TO/GA roll guidance is wings level at lift off until 5 feet RA, then it maintains ground track.
TO/GA (Roll) (In Flight)
In flight TO/GA is armed whenever the flaps are extended or at glideslope capture. There is no FMA for TO/GA armed in flight. TO/GA is engaged in flight by pushing a TO/GA switch. The AFDS maintains ground track present at mode engagement.
LNAV (armed)
LNAV is armed by pushing the LNAV switch. The switch light bar is displayed and LNAV is annunciated on the PFD role mode annunciator in small white letters below the current role mode.
LNAV (engaged)
LNAV engages if above 50 feet and within 2.5 NM of the active route leg. LNAV is annunciated in green letters on the PFD role mode annunciator. The AFDS follows the active leg displayed on the ND.
HDG SEL (engaged)
Airplane is turning to or is on the heading selected in the MCP HDG/TRK window.
HDG HOLD (engaged)
The AFDS holds the present heading. If turning the FDS holds the heading reached after rolling wings level.
TRK SEL (engaged)
Airplane is turning to or is on the track selected in the MCP HDG/TRK window.
TRK HOLD (engaged)
The AFDS holds the present track. If turning, the AFDS holds the track reached after rolling wings level.
ATT (engaged)
When auto pilot first engaged, or F/D first turned on in flight, or approach mode disengaged by reselecting APP after LOC capture (above 1500 feet RA).
-if Bank angle is greater than 30°, a FDS returns to 30° bank.
-if Bank can go between 30° and 5°, AFDS holds Bank angle.
-If Bank can go less than 5°, AFDS commands wings level.
LOC (armed)
The AFDS captures the localizer when within range and within 120° of the localizer track.
LOC (engaged)
The AFDS follows the selected localizer course.
ROLLOUT (armed)
Displays between 1500 feet RA; engages below 2 feet RA.
ROLLOUT (engaged)
After touchdown, the a FDS uses rudder and nosewheel steering to keep the airplane on the localizer central line.
TO/GA (Pitch) (on the ground)
Engaged when the first F/D switch is selected ON, or when either TO/GA switch is pushed with speed greater than 80 KIAS. The flight Director PFD pitch bar indicates an initial pitch up of 8°.
