TM 1-1510-225-10
3A-18
1. Inches
of
Mercury/Millibar
Push-Button
Selector Switch
2. Altimeter Scale (Hundreds or Feet)
3. Altimeter Indicator Needle
4. Altitude Display
5. Altitude ALERT Annunciator
6. Altitude Select/Density Altitude Display
7. Altitude Select/Density Altitude Annunciator
8. Altitude/Vertical Speed Preselect Control
9. Altitude Select Key
10. Vertical Speed Engage Key
11. Altimeter Setting Selector/ Push To Test
Control
12. Vertical Speed Indicator Scale
13. Vertical Speed Invalid Annunciator
14. Vertical Speed Indicator Needle
15. Preset Vertical Speed Selection Indicator
16. Inches of Mercury/Millibar Annunciator
17. Altimeter Setting Display
18. Altimeter Invalid (ALT) or FAIL Annunciator
Figure 3A-7. Altitude/Vertical Speed Indicator
NOTE
If the vertical speed selection indicator on
the vertical speed indicator scale is in view
when vertical speed hold is engaged, the
pre-selected
vertical
speed
will
be
commanded. If the indicator is not in view
when vertical speed is engaged, the
aircraft's
current
commanded
vertical
speed will be maintained and the indicator
will come into view synchronized with the
vertical speed indicator pointer.
(i) Vertical Speed Indicator Scale. The
vertical speed indicator scale displays instantaneous
vertical speed with 100-foot resolution for values less
than 1000 feet per minute up or down, and with
500 feet per minute resolution for larger values.
(j) Vertical Speed Invalid Annunciator.
Illumination of the vertical speed invalid annunciator
placarded VS, indicates an invalid display.
