737 Flight Crew Operations Manual
Supplementary Procedures -
Automatic Flight
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP SP.4.3
Intervention of FMC Altitude Constraints during VNAV
Descent
MCP altitude selector .....................................................Set new altitude
New altitude must be lower than the FMC altitude constraint (s) to
be deleted.
ALT INTV switch .............................................................................Push
Each push of the ALT INTV switch will delete an FMC altitude
constraint.
If all FMC altitude constraints are deleted, the descent mode will
revert to a VNAV speed descent.
Intervention of FMC Airspeed Constraints during VNAV
SPD INTV switch .............................................................................Push
MCP IAS/MACH display shows current FMC target speed.
IAS/MACH Selector ....................................................Set desired speed
VNAV remains engaged.
To resume former FMC speed:
SPD INTV switch ...................................................................Push
MCP IAS/MACH display blanks and FMC commanded VNAV
speed is active.
Altitude Hold
Altitude HOLD switch .....................................................................Push
Verify FMA display:
Pitch mode – ALT HOLD
Heading Select
Heading selector ....................................................... Set desired heading
Heading select switch .......................................................................Push
Verify FMA display:
Roll mode – HDG SEL
September 24, 2015
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