TM 1-1510-225-10
3A-22
j. Directional
Gyros
(KCS
305).
The
directional gyros provide heading information to the
gyro adapter that provides digital heading information
to the autopilot/flight director computer and to the air
data computer.
k. Rate Turn Gyros (KCS 305). The rate turn
gyros provide turn rate information to the gyro adapter
that provides digital turn rate information to the
autopilot/flight director computer and to the air data
computer.
l. Flight Director Mode Selector (KMS 446).
The flight director mode selector provides for selection
of flight director/autopilot mode of operation.
(1) Flight Director Mode Selector Controls,
Indicators, And Functions. Refer to Figure 3A-9.
(a) Heading Mode Push-Button Selector
Switch. Pressing the heading mode push-button
selector switch, placarded HDG, selects the flight
director heading mode. In the heading mode the flight
director commands roll attitudes necessary to track the
heading indicated by the heading marker position on
the EHSI and EADI.
Activating the heading mode cancels any other
horizontal tracking mode. The heading mode may be
used during nav arm or approach arm sequences, but
disengages automatically in favor of nav or approach
capture or track functions.
(b) Heading
Mode
Annunciator.
Illumination
of
the
heading
mode
annunciator,
placarded HDG, indicates that the heading hold mode
has been selected and is engaged.
1. Heading Mode Push-Button Selector Switch
2. Heading Mode Annunciator
3. Navigation
Mode
Push-Button
Selector
Switch
4. Navigation Mode Arm Annunciator
5. Approach Mode Push -Button Selector Switch
6. Approach Mode Arm Annunciator
7. Flight Director Mode Push-button Selector
Switch
8. Flight Director Mode Annunciator
9. Not Used
10. Not Used
11. Not Used
12. Not Used
13. Vertical Speed Hold Mode Annunciator
14. Vertical Speed Hold Push-Button Selector
Switch
15. Indicated Airspeed Hold Mode Annunciator
16. Indicated Airspeed Hold Mode Push-Button
Selector Switch
17. Descent Mode Annunciator
18. Descent Mode Push-Button Selector Switch
19. Climb Mode Annunciator
20. Climb Mode Push-Button Selector Switch
21. Altitude Select Arm Annunciator
22. Altitude Select Mode Push -Button Selector
Switch
23. Altitude Hold Mode Annunciator
24. Altitude Hold Mode Push-Button Selector
Switch
Figure 3A-9. Flight Director Mode Selector
