737 Flight Crew Operations Manual
Flight Management, Navigation -
FMC Messages
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D6-27370-866-EGP 11.60.11
ALERTING MESSAGE CAUSE CORRECTIVE ACTION
SINGLE FMC
OPERATION
The primary FMC has
determined that the
secondary FMC is not
available. (Dual FMC as
installed)
If the FMC source
selector switch is in the
“Normal” position,
move to “BOTH ON L”.
No action is required if
the FMC source selector
switch is already
positioned to “BOTH
ON L” or “BOTH ON
R”.
SW OPTIONS
INVALID
(U10.5 and later)
The CRC performed
during power up BIT on
the current software
options data base has
failed, or the CRC of the
software options data
base that has been loaded
via the data loader has
failed.
Reload the FMC OPC
software by
maintenance.
TAKEOFF SPEEDS
DELETED
(U10.6 and later)
A change to runway,
runway data, takeoff
thrust selection or
performance data is
made after the V speeds
have been selected, or
entered V speeds fail to
meet relative value
check.
Reselect new V speeds
and clear message.
September 15, 2016
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