Questions tagged [flight-director]

A marker on the PFD or MFD indicating the proposed attitude the autopilot will fly.

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2
votes
0answers
118 views

Can commercial automatic flight control fly back-side?

For most commercial flight director, autopilot and auto-throttle systems (e.g. the A330-300, B737-800), the flight director/autopilot flies the altitude hold (ALT) or vertical speed (V/S) mode by ...
1
vote
1answer
468 views

A320/321 FMA indications with Both Flight Director Channel Failed

I hope that someone can answer my question. My friend had “FD 1+2 Failure” in simulator during the low visibility approach. Flight Directors on PFD disappeared, but no FMA change and no approach ...
3
votes
2answers
2k views

Airbus A320 automatic speed mode protection in SRS vertical mode

According to the A320 FCOM, capter 22 auto flight, flight guidance, the "automatic speed mode protection" of the auto flight system of the A320 disengages the flight directors upon reaching current ...
9
votes
2answers
4k views

How does an Airbus pilot decide whether to use HDG-V/S or TRK/FPA guidance?

The Flight Control Unit of modern Airbus aircraft has a pushbutton for selection of either heading / vertical speed (HDG-V/S), or track / flight path angle (TRK-FPA) guidance for the Autopilot and ...
4
votes
2answers
698 views

Why are Flight Directors turned on so early?

I have noticed that the requirement to turn on the Flight Directors in a commercial aircraft is in one of the very first checklists. Why does this have to be the case when the Flight Directors are ...
4
votes
1answer
343 views

Why is the flight director at 9 degrees nose high when hitting TOGA?

Why is the flight director set to 9 degrees pitch up, when pressing the takeoff / go-around (TOGA) button? In all the jets I fly, this is the case and I would be curious to know if other jets set ...
9
votes
1answer
599 views

Do pilots have procedures and safeguards against unintended altitude captures?

Most advanced autopilots with a guidance panel allow you to select an altitude and fly to it. It will often switch over to an altitude hold mode if the airplane is close enough to the selected ...
5
votes
2answers
371 views

Is it possible to disengage only one axis of a two-axis autopilot?

Take GFC700 for example, when autopilot (or flight director) engaged, the lateral mode falls into ROL, HDG, GPS, VOR, VAPP, LOC, BC, ... and the vertical model has to fall into PIT, ALT, FLC, VS, ...
6
votes
1answer
2k views

How may I verify WAAS channel number on G1000?

Take RNAV (GPS) Y RWY 36L and RNAV (GPS) Z RWY 36L at APC for examples, All fixes and routes in the two approaches are similar. The noticeable differences that I observe are minimums and WAAS CH ...
4
votes
1answer
365 views

In G1000, how can I intercept a victor airway with multiple legs?

Suppose we are in HDG mode. Trivially, we may visually judge which leg we on the victor airway and activate that leg. However, in real-world, I found sometimes the fixes are so close and the ...
37
votes
4answers
35k views

What is a “Flight Director”?

What is a Flight Director, and how does it differ from Autopilot?