User manual

9 BMS AP OPERATION SUMMARY

The following charts depicts the main functions of the AP in the BMS executable.

Switch Position Remarks

HDG SEL

(up)

When the autopilot is on, placing the roll mode switch in this position causes the

AP to turn the jet towards the heading currently selected in the HSI gauge (center

console).

ATT HLD

(center)

When the autopilot is on, placing the roll mode switch in this position causes the

AP to hold the current bank angle at which the aircraft is flying. Stick steering for

the roll axis is available with this setting.

Roll mode

(left)

STRG SEL

(down)

When the autopilot is on, placing the roll mode switch in this position causes the

AP to turn the jet towards the currently selected in the navigation system (note

that this may be a steer point, mark point or equivalent).

ALT HLD

(up)

Placing the switch in this position turns on the AP function. The AP will attempt to

hold the altitude at which the jet is currently flying. Roll mode is determined by the

roll mode switch.

OFF

(center)

Placing the switch in this position turns off the AP. All AP control is terminated.

Pitch

mode

(right)

ATT HLD

(down)

Placing the switch in this position turns on the autopilot. The AP will attempt to

hold the pitch attitude at which the jet is currently flying. Stick steering for the pitch

axis is available with this setting. Roll mode is determined by the roll mode

switch.

Note that the roll mode selection is independent of pitch mode selection. The AP is only on and

engaged when the pitch switch is in either the ALT HLD or ATT HLD position. When the AP is on

the roll mode is determined only by the position of the roll modes control switch.

Note that movement of the roll mode switch when the AP is off (pitch mode switch in center

position) has no effect on aircraft controls.