737 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Messages
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D6-27370-866-EGP 11.60.9
ALERTING MESSAGE CAUSE CORRECTIVE ACTION
OAT DISAGREE -
DELETED
(U12.0 and later)
A check of entered OAT
versus sensed OAT
occurs after first engine
start. A difference of +/-
6 degrees Celsius
between the OAT value
on the N1 LIMIT /
TAKEOFF REF page
and the engine
temperature sensors.
Enter updated/corrected
OAT on the N1 LIMITS
page.
OVERSPEED
DISCONNECT
(U10.2 and later)
During path descent and
above or below the speed
restriction altitude,
VNAV disengages when
airspeed exceeds FMC
speed restriction by more
than 15 knots.
Manually reduce speed
and reengage VNAV.
PARTIAL ROUTE
LOADED
(U10.3 and later)
A route is loaded which
references data not
contained in the
database.
Clear the message.
PARTIAL ROUTE X
LOADED
(U11.0 and later)
A route is loaded into the
active/inactive RTE 1 or
2 flight plan buffer
which references data
not contained in any of
the databases.
Clear the message.
PERF DEFAULTS
INVALID
Validity check of
performance defaults
database has failed.
Contact maintenance
personnel.
September 15, 2016
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