Flight Director Display
Turning a F/D (Flight Director) switch ON displays command bars on the respective pilot’s
attitude indicator if command pitch and roll modes are engaged. If command pitch and roll
modes are not engaged, the F/D command bars do not appear. The F/Ds can be
operated with or without the A/P and A/T. F/D command modes can be used with
an A/P engaged in CWS.
F/D commands operate in the same command modes as the A/P except:
- The takeoff mode is a F/D only mode.
- Dual F/D guidance is available for single engine operation.
- The F/D has no landing flare capability. F/D command bars retract from view at
approximately 50 feet RA on an ILS approach.
Normally, FCC A (Flight Control Computer) drives the captain’s command bars and FCC B
drives the firstofficer’s command bars. With both F/D switches ON, the logic for both pilots’
F/D modes is controlled by the master FCC, and both FMA (Flight Mode Annunciator)
displays show the same mode status.
The master FCC is indicated by illumination of the respective master (MA) F/D
indicator light. The master FCC is determined as follows:
- With neither A/P engaged in CMD, the FCC for the first F/D turned on is the master.
- With one or both A/Ps engaged in CMD, the FCC for the first A/P in CMD is the
master FCC, regardless of which F/D is turned on first.
