737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
FMC Cruise
11.42.20
MN-FLT-OH-201
A CRZ DES will occur upon lowering the MCP ALT to a lower altitude, but at or
above any descent constraint altitude and pressing ALT INTV if the airplane is
further than 50 nm from the top of descent at the current cruise altitude, or by
entering a new cruise altitude on the FMC CRZ page after setting the new level-off
altitude in the MCP
The FMC software allows a CRZ DES to the normal Descent Path capture if the
normal path is encountered during the Cruise Descent and prior to reaching the
new cruise altitude. The active VNAV descent phase will be entered from a Cruise
Descent at the time the extended descent path is captured.
1B401, 1B801 - 1B806
Note:
VNAV CRZ DES guidance at 1000fpm may not capture a new cruise
altitude with sufficient distance to comply with any fix or waypoint
altitude constraint if the fix or waypoint altitude constraint is the same as
the new cruise altitude. Any fix or waypoint constraint that is the same as
the cruise altitude may not be considered in the initial vertical trajectory. If
initiating early descent, VNAV descent predictions will update the vertical
path to include the fix or waypoint constraint.
1
Cruise Altitude (CRZ ALT)
Initially displays the CRZ ALT entered on the CRZ page.
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-
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-
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-
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-
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N
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A
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0
8
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/
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T
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7
.
4
0
0
2
/
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5
.
M
N
5
1
0
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0
1
/
0
4
2
o
9
2
1
4
1
/
%
3
.
1
A
L
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N
N
>
S
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D
T
S
A
C
E
R
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F
<
R
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>
E
S
A
M O D
VNAV
C
A
B
L
3
/
1
C
T
C
A
Z
R
3
/
2
C
T
1
2
3
4
DESCENT MODE
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March 1, 2021
