Mooney M20M, Pilot Operating Handbook

Page: 333 / 377

190-02291-18 Rev. 5 AFMS – GFC 500 Mooney M20M/M20R/M20S Series
Page 4–3
VERTICAL NAVIGATION (VNAV)
1. Navigation Source ............................................................................................ SELECT CDI to GPS
2. Vertical Navigation Profile ................................................ LOAD into the GPS navigator’s flight plan
3. Altitude Preselect ......................................................................... SET to the vertical clearance limit
When ATC clearance received.
4. GMC 507 Mode Panel ................................................................................................. PRESS VNAV
NOTE
Vertical navigation will not function for the following conditions:
•
Selected navigation source is not GPS navigation. VNAV will not function if the navigation
source is VOR or Localizer.
•
VNAV is not enabled on the GPS Navigator
•
If the altitude preselect is not set below the current aircraft altitude.
•
No waypoints with altitude constraints in the flight plan
•
Glideslope or Glidepath is the active flight director pitch mode.
•
OBS mode is active
•
Dead Reckoning mode is active
•
Parallel track is active
•
Aircraft is on the ground
Vertical navigation is not available between the final approach fix (FAF) and the missed approach
point (MAP)
ALTV will be the armed vertical mode during the descent if the altitude preselect is set to a lower
altitude than the VNAV reference altitude. This indicates the autopilot / flight director will capture
the VNAV altitude reference. ALTS will be the armed mode during the descent if the altitude
preselect is set at or above the VNAV reference altitude, indicating that the autopilot / flight director
will capture the altitude preselect altitude reference.