S-TEC System 55X, Operating Handbook

Page: 24 / 56

4-14 2nd Ed: May 31, 2002
SYS FIFTY FIVE X POH
The + (positive) symbol annunciation indicates a veritcal speed climb
selection. Clockwise rotation of the VS knob increases the rate of climb
and counter-clockwise rotation decreases the rate of climb to 0. The
-
(negative) symbol annuncation indicates a vertical speed descent
selection. Counter-clockwise rotation of the VS knob increases the rate
of descent and clockwise rotation decreases the rate of descent to 0.
Maximum selectable VS limits are
# #
# # #
1600 feet-per-minute (FPM) in most
aircraft (see the AFMS for your installation).
NOTE:
If the VS Mode annunciator flashes while in the VS
Mode, this is an indication of excessive error between
actual vertical speed compared to selected vertical
speed (usually in a climb) and the pilot should adjust
aircraft power or reduce the vertical speed command
as appropriate.
4.2.10 Altitude (ALT)
The Altitude Mode, ALT, may be engaged with any roll mode displayed by
pressing the ALT Mode switch. The aircraft will maintain the pressure
altitude present at the time of the ALT Mode selection.
Altitude Correction for enroute barometic pressure changes may be made
while in ALT Mode by rotation of the VS knob. Each "click" will change the
altitude by 20 ft. The maximum altitude correction is
# # # # # 360 ft. Corrections
in excess of # #
# # #
360 ft. will require selecting the VS Mode and climbing or
descending to the new altitude and re-engaging ALT Mode.