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Controls and Indications......................................................................................................01-01-24
Description.................................................................................................................01-01-24
PFD Messages....................................................................................................................04-01-25
EICAS Messages................................................................................................................04-01-27
May 06/2005 Flight Crew Operating Manual Volume 2 REV 2 CSP 100-6
04-00-01
INTRODUCTION
The automatic flight control system (AFCS) provides a means of automatically controlling the aircraft flight path. The AFCS reduces the flight crew workload by providing steering commands through the flight director or automatically flying the aircraft through the autopilot. The main functions of the AFCS are:
-Dual independent flight directors
-Two axis (pitch and roll) autopilot
-Single axis yaw damper
When manually flying the airplane, dual flight directors provide steering commands to the pilots through flight director command bars displayed on the primary flight displays. For automatic flight control, the flight director steering commands are coupled to the autopilot.
Sep 13/2004 Flight Crew Operating Manual Volume 2 REV 1 CSP 100-6
04-01-01 FLIGHT DIRECTORS (FD)
DESCRIPTION
The flight directors display flight guidance cues on the attitude indicators, thereby assisting the flight crew in maintaining a specified flight path. The flight guidance cues are displayed in the form of flight director command bars. The crew can choose to hand fly the aircraft with "raw data" (flight directors not displayed), hand fly the aircraft using the flight director command bars, or couple the autopilot to the flight director.
COMPONENTS AND OPERATION
The flight director (and autopilot and yaw damper) processing is done within two flight guidance computer cards in the integrated avionics processor system (IAPS). The left and right flight guidance computer cards are identical. During pre-cision approach and go-around modes, each flight director provides guidance to the onside displays. In all other flight di-rector modes, only one flight director provides guidance to both left and right flight displays.
The pilot flying can select the onside flight director using the transfer (XFR) button on the flight guidance panel.
If the active flight director fails, a red boxed FD appears on the primary flight display and a cyan FD1(2) FAIL CAS mes-sage is displayed. Selecting the XFR switch on the FGP deselects the failed flight director and allows the functional flight director to become active.
FLIGHT DIRECTOR COMMAND BARS
The flight directors provide visual pitch and roll control guidance by means of single cue inverted V-shaped command bars, or cross-pointer command bars. The selection of the preferred display of command bars is made by pushing the REF button to show page 3/3 on the PFD. The flight director command bars provide visual guidance to the pilot regardless of the au-topilot engagement mode.
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