Automatic Flight/FMS/Nav Flashcards
4 ways to disengage activated AP?
- Disengage switch on control yoke
- Disengage Bar
- AP CMD Button (respective)
- NORM STAB TRIM
How is C A/P powered when APP armed?
HOT BATT BUS
After takeoff selection of FLCH does what?
- Autothrottles will engage in CLB THR
- A/T FMA = N1
- FLCH pitch mode engaged
- Pitches for MCP airspeed
What modes can be ARMED prior to becoming active and what’s unique about how they can be disarmed?
- LNAV
- LOC
- APP
Pushing switch before becoming active will DISARM
If APP is ARMED and LOC/GS captured, how can APP mode be canceled?
- Disengage AP + Turn OFF both FDs
- Go-Around selected
MCP THR MODE selects?
Sets N1 to THR REF
and
Snap Shot of PPOS taken from FMC when pressed after takeoff.
FLCH during CLIMB (THR + Pitch)?
- A/T advances thrust to max of the selected mode reference thrust (CLB/CLB1/CLB2)
- AFDS pitches for selected speed
FLCH during descent (THR + Pitch)?
- Descent planned for MCP ALT in 2 mins
else:
- A/T sets idle thrust
- AFDS pitches to hold selected IAS
LNAV capture criteria?
- A/C will capture LNAV if within 2.5NM of active route segment, regardless of HDG
- If more than 2.5NM, A/C must be on intercept HDG and able to capture segment before the active waypoint.
ALL CAT II and CAT III APPs must terminate?
Flown by?
Recommended flaps?
with AUTOLAND or MAP
CAPT only LAND
FLAPS 30 recommended for sight picture
Once APP commenced, can it be continued if required RVR drops below MINS?
CAT3 = YES
CAT2 = YES, provided proper visual cues are in sight by the DA(H)
When will ASA display LAND2/LAND3?
When descending through 1,500’
FAIL OPERATIONAL vs FAIL PASSIVE
*See image below…
FLARE(FMA) + Thrust Idle + ROLLOUT(FMA) engaged during AUTOLAND sequence?
FLARE = 50’ RA
THR IDLE = 25’ RA
ROLLOUT = 5’ RA
CAT1 or better AUTOLAND?
Must advice ATC to ensure ILS critical area is clear and protected.
