Saab 340B, Operation Manual

Page: 166 / 670

AUTOFLIGHT, CAT I
Operation
Aircraft Operations Manual
3.2
S
PAGE 8
Apr 01/15
CONDITIONS NORMAL PROCEDURES
(Cont’d)
− Monitor the system when approaching the selected altitude. Verify altitude
alert and that the annunciation changes from armed (ALTS in white) to cap-
ture (ALTS in green) when approaching the altitude.
− At altitude capture, FD/AP commands changes in pitch attitude to guide air-
craft onto, and hold, selected altitude.
Change of APA setting during capture phase will revert FD/AP to basic mode VS.
NOTE
− At capture check EADI to annunciate ALTS in green. Flight advisory speed
for long range cruise (knots IAS) comes on when ALTS in track.
2.11 V NAV MODE
(Optional)
The vertical Navigation Indicator (VNI), (if installed), computes and displays the
required parameters for Vertical Navigation (V NAV).
Automatic patch capture above or below present altitude using initial vertical
speed:
1. NAV frequency selector SET VOR/DME . . . . . . . . . . . . . . . . . . . . . . . . . .
FREQUENCY
2. Altitude preselect CLEARED TO ALT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Aimpoint altitude SET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
− Set function switch to ACT. Push the SET/PUSH SEL knob and observe ALT
FT annunciated. Rotate knob to set the cleared to aimpoint altitude in
SETUP display.
4. Offset from DME (if desired) SET NM BEFORE . . . . . . . . . . . . . . . . . . . . . .
OR AFTER DME
STATION
− Push SET/PUSH SEL knob twice and check OFFSET NM annunciator.
− Rotate SET/PUSH SEL knob until SETUP display indicates desired offset
and offset annunciator shows correct location before or after the DME sta-
tion.
To change OFFSET from AFTER (A) to BEFORE (=), rotate SET/PUSH SEL
knob clockwise, then counter
− clockwise until annunciator shows BEFORE (=).
Then rotate clockwise for correct offset in nautical miles.
NOTE
5. Station elevation SET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
− Push SET/PUSH SEL knob and observe STA EL FT annunciated.
− Rotate SET/PUSH SET knob to set up station elevation to the nearest 100 ft.
(Cont’d)