737 MAX Flight Crew Operations Manual
Flight Management, Navigation -
Flight Management System
Operation
11.31.38
MN-FLT-OH-201
Examples of three digit (xxx, FLxxx) entries with transition altitude = 10,000 feet:
• 800 feet is entered as 008 or FL008 and displayed as 800
• 1,500 feet is entered as 015 or FL015 and displayed as 1500
• 11,500 feet is entered as 115 or FL115 and displayed as FL115
• 25,000 feet is entered as 250 or FL250 and displayed as FL250.
Four digit entries represent feet, rounded to the nearest ten feet. Leading zeros are
required. This form is used when the altitude does not exceed 9,994 feet.
Examples of four digit (xxxx) entries with transition altitude = 18,000 feet:
• 50 feet is entered as 0050 and displayed as 50
• 835 feet is entered as 0835 and displayed as 840
• 1,500 feet is entered as 1500 and displayed as 1500
• 8,500 feet is entered as 8500 and displayed as 8500
• 9,994 feet is entered as 9994 and displayed as 9990.
Five digit entries represent feet, rounded to the nearest ten feet. This form is used
when the altitude exceeds 9,994 feet.
Examples of five (xxxxx) digit entries with transition altitude = 4,000 feet:
• 50 feet is entered as 00050 and displayed as 50
• 835 feet is entered as 00835 and displayed as 840
• 1,500 feet is entered as 01500 and displayed as 1500
• 8,500 feet is entered as 08500 and displayed as FL085
• 9,995 feet is entered as 09995 and displayed as FL100
• 11,500 feet is entered as 11500 and displayed as FL115
• 25,000 feet is entered as 25000 and displayed as FL250.
Negative altitude entries are allowed to –1000 feet.
Airspeed Entry
Airspeeds can be entered into the FMC as calibrated airspeed or Mach number.
Calibrated airspeeds are entered as three digits (xxx) in knots. Mach numbers are
entered as one, two, or three digits following a decimal point.
Data Pairs
Many CDU pages display data in pairs separated by a slash “/.” Examples of these
pairs include wind direction/speed and waypoint airspeed/altitude restrictions.
When entering both values in a pair, the slash is inserted between the values. When
it is possible to enter only one value of the pair, the slash may not be required.
When entering only the outboard value of a pair, the trailing or leading slash may
be entered, but is not required before transferring to the data line. When entering
the inboard value of a pair, the trailing or leading slash must be entered before
transferring to the data line. Omission of the required slash normally results in an
INVALID ENTRY message.
March 1, 2021
