737 Flight Crew Operations Manual
Flight Management, Navigation Chapter 11
FMC Messages Section 60
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D6-27370-866-EGP 11.60.1
60 FMC MessagesFMC MessagesFile Hig hlight
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)
YK981 - YQ456
• ATC data link messages (alerting)
YK996 - YW274
• 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 instrument 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.
September 15, 2016
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