737 MAX Flight Crew Operations Manual
Automatic Flight -
Controls and Indicators
4.10.8
MN-FLT-OH-201
• uncorrected barometric altitude at which ALT HLD switch was pressed
if not at MCP selected altitude
•pitch mode annunciates ALT HOLD
•ALT HLD switch light illuminates.
When in ALT HOLD at selected MCP altitude:
• selecting a new MCP altitude illuminates the ALT HLD switch light and
arms V/S mode
• LVL CHG, V/S, and VNAV climb and descent functions are inhibited
until a new MCP altitude is selected.
ALT HOLD mode is inhibited after G/S capture.
The selected MCP altitude is referenced to:
• Captain’s barometric altimeter setting for A A/P and F/D
• First Officer’s barometric altimeter setting for B A/P and F/D.
Note:
After ALT HOLD engages, changes in altimeter barometric settings do not
change the selected altitude reference.
9
Vertical Speed (V/S) Switch
Push –
• arms or engages V/S command mode
• commands pitch to hold vertical speed
• engages A/T in speed mode to hold selected airspeed
• annunciates V/S pitch mode and illuminates V/S switch light.
Vertical Speed Command Mode
The V/S mode commands pitch to hold selected vertical speed and engages A/T
in SPEED mode to hold selected airspeed. V/S mode has both an armed and an
engaged state.
Engaged –
• annunciates V/S pitch mode
• vertical speed display changes from blank to present vertical speed
• desired vertical speeds can be selected with vertical speed thumbwheel.
V/S becomes armed if:
• pitch mode is ALT HLD at selected MCP altitude and
• new MCP altitude is selected (more than 100 feet from current altitude).
With V/S armed, V/S mode is engaged by moving vertical speed thumbwheel.
March 1, 2021
