737 MAX Flight Crew Operations Manual
Flight Management, Navigation
Chapter 11
FMC Messages
Section 60
MN-FLT-OH-201
11.60.1
60 FMC Messages
FMC Messages
File Highlight
Introduction
FMC messages tell the flight crew when system operation is degraded or if there
are data input errors.
FMC messages show in the CDU scratchpad. The messages are categorized as:
• alerting messages
• entry error messages
• advisory messages.
• FMC data link messages (alerting and advisory)
1B401 - 1B785, 1B801 - 1B824, 1J590 - 1J594
• ATC data link messages (alerting)
1B785, 1B786, 1J585 - 1J594
• FMC Navlink ACARS messages (active, inactive, and scratch pad)
The FMC messages are shown according to their level of importance. Alerting
messages are most important, followed by entry error messages. Advisory
messages are least important. If multiple messages exist, a less important message
replaces another message in the scratchpad when the CLR key is pushed or the
condition is corrected.
The amber FMC alert light on each pilot’s main panel illuminates when there is an
FMC alerting message. All FMC messages illuminate the CDU message (MSG)
light. Clear the message or correct the condition to cancel the message.
The following tables are general lists; some messages may not apply to all FMC
configurations.
March 1, 2021
