737 MAX Flight Crew Operations Manual
Limitations -
Limitations and Operational
Information
L.10.8
MN-FLT-OH-201
Flight Management, Navigation
AFM Limitations
Air Data Inertial Reference Unit (ADIRU)
ADIRU alignment must not be attempted at latitudes greater than 78 degrees 15
minutes.
All flight operations based on magnetic heading or magnetic track angle are
prohibited in geographic areas where the installed IRS MagVar table errors are
greater than 5 degrees.
Refer to Operating Data/Inertial Reference System (IRS) section of AFM for
procedures to determine the geographic areas and magnitude of MagVar errors for
the specific MagVar table installed in the IRS and if any of these limitations apply.
1B785, 1J585 - 1J594
For Fail-Operational Autopilot, all autopilot/flight director ILS (and GLS if
installed) approach and landing operations that use magnetic north referenced
courses or bearings are prohibited in geographic areas where the installed IRS
MagVar table errors are greater than 3 degrees.
Look-Ahead Terrain Alerting (GPWS)
Do not use the terrain display for navigation.
Do not use the look-ahead terrain alerting and terrain display functions:
• within 15 nm of takeoff, approach or landing at an airport or runway not
contained in the GPWS terrain database.
Note:
Refer to Honeywell Document 060-4267-000 for airports and runways
contained in the installed GPWS terrain database.
Overrun Warning (ORW) Alerting System
1B785, 1B786, 1B814 - 1J594
(as installed)
The ORW alerting system does not replace the requirement to conduct an en route
landing distance performance assessment prior to landing. The lack of an overrun
alert does not guarantee the airplane can stop prior to reaching the runway end.
If the In-Air Overrun Warning (“OVERRUN, GO-AROUND”) occurs during
approach, execute an immediate go-around.
Inhibit the overrun alert when:
• Landing OAT on the ground is below –40°C or greater than 50°C; or
• Gross Weight is greater than Maximum Landing Weight.
March 1, 2021
