Automatic Flight Flashcards
How many FCCs?
3
What powers the L and C autopilot?
L main AC Bus
what powers the R autpilot?
R main AC Bus
During approach what powers the Center AP
Standby/batt system
How many autopilots can be used at a time?
1, during approach autopilots that are operable will automatically engage
if both FDs are off or the aircraft is in TO or GA mode what happens when selecting AP on?
Roll mode: HDG Hold
Pitch mode: VS
If either FD is on what lateral and vert mode will the aircraft fly?
the one previously selected
What does AT EPR mode mean?
The AT will control to the selected EPR thrust reference set by the TMC
What does SPD mode mean for AT selection?
AT controls thrust to maintain speed selected in IAS/Mach
VNAV is engaged, the speed as programmed by the FMC
If changing bank angle limit, will it make a difference in LNAV mode?
No, only if in HDG SEL
Can you fly VS away from selected MCP altitude?
Yes
When does Land 3 display?
THe a/c is below 1500 RA, App mode is active, and the asa shows the aircraft systems are accpetable for cat III ops
When does land 2 display?
the same as land 3 except the a/c is acceptable for cat II ops. Redundancy is such that a single fault cannot cause a significant deviation from the flight path.
How many APs required for autoland?
At least 2
When does LNAV activate?
In position to turn onto an active route leg. In flight, selection causes immediate activation if within 2/5 NM of active leg
HDG HOLD will go back to hdg when originally pushed?
No, it will hold hdg at wings level
When will the a/c capture the localizer?
When within range and a/c heading is within 120 degrees of loc front course
After localizer and glideslope capture how do you deactivate the modes?
Must disengage AP and turn off both FDs or by selecting Go around mode
How do you arm T/O mode?
Turn on one of the Flight Directors. lateral mode is ground track
When is GA mode armed?
Flaps are out of the up position and at G/S Capture. Roll mode is constant ground track
When can you select a new pitch or roll mode in GA?
After 400 feet RA
Describe the pitch mode for TO.
Initial pitch is 8 degrees, after takeoff pitch attitude to the greater of v2+15 or liftoff speed +15. If current airspeed remains above the target speed for 5 seconds, it resets up to v2+25. The AFDS uses the speed set in the IAS/Mach window prior to takeoff for v2 (important for loss of engine)
How many degrees must the a/c be within the loc for G/S capture ?
80 degrees
What FPM climb rate will go around mode set?
2,000 fpm
