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a single-channel failure will not affect the operation of
the applicable subsystem. In the event that both channels
have failed, the subsystem will be maintained as NOT
READY, making the subsystem unavailable to the rest
of the system.
38-7 ORIGINAL
NAVAIR 0%F14AAD-1
NO GO Subsystem has at least one WRA fault detected as a result of performing one of
its Bm modes. These failures are reported to the MCS only after an approprlate
failure threshold has been reached. Depending on the etient of the failure, the
subsystem may not be operationally usable by thesystem, causing a degraded
mode to be entered where available. Subsystems that are not on a data bus
and are not responding due to being powered down or not Installed are
reported as NO GO.
STATUS
NOT READY
DEFINlTlON
Subsystem Is not responding on a data bus as determined by the MCS, due to
one of the followlng conditions: power-down, not Installed, remote terminal
failure, bus message enor, excessively busy, or failure of all data bus channels
to a particular subsystem. In addltlon, any bus subsystem that does not
complete commanded BIT within a speclfled perlod of time will be set to thls
status type.
1
CONFIG ERROR Subsystem has an Inconsistent sofhvare program, or firmware load as
determlned by the MCS. This type of failure does not preclude the system from
operatlonally using the affected subsystem. The subsystem can be powered
down at the flightcrew’s Ulscretlon to prevent the subsystem from being used
by the system.
I
Figure 38-S. Defmition of Status Types
Software compatibility test is performed by the MCS
in order to detect incompatible software program loads
as compared to the configuration for the rest of the system.
In addition, a subsystem will test and report the
internal compatibility between its main program load
and fmware. Each subsystem is tested by the MCS on
MCS scold start and when a subsystem fmt responds on
the data bus. When an incompatibility is detected with
a subsystem, the subsystem status will be maintained as
CONFIG ERROR, and a computer message will be displayed
indicating the WRA at fault.
38.3.12 BIT Status/Priorities. OBC display formats
provide the flightcrew with continuous status of avionics
and radar subsystems.N ote that weapona nd stores
status are displayed on the SMS format, which is selectable
from the menu format. Failure acronyms am displayed
on the OBC formats for every failed item. These
acronyms identify failures at the subsystem and WRA
level on various OBC formats. Equipment BIT status is
displayed as either NO GO, NOT READY, or CONFIG
ERROR. Refer to Figure 38-5 for status-type defmitions.
Note that absence of a failure acronym indicates
that the equipment is GO. Refer to Figure 38-6 for a list
of subsystemsv ersust ypes of status.N ote.t hat when the
MCS cold-starts as a result of a power-transient or a
system reset, BIT status for equipment that is NOT
READY will not be displayed as such for 1 minute.
After this time has elapsed, only equipment that is currently
NOT READY will be considered failed. This
allows subsystemst hat needt ime to warm up or perform
initial BIT to do so without being prematurely reported
asNOO0.
Each mode of subsystem BIT is weighted according
to the amount of fault isolation that it provides. Subsystem
failures can be removed from the system (i.e., will
clear any equipment failure maintained by the MCS)
only by one of the following:
1. Selecting system reset.
2. Cycling power to the MCS.
3. Cycling power tc subsystem (only pertains to
equipment on data bus). During power-off, equip
ment BIT status reverts to NOT READY.
4. CONFIG ERROR is overridden by NO GO or
NOT READY.
5. Equipment status of NO GO will remain unless
same or higher weight of BIT reports GO
condition.
ORIGINAL 38.8
NOT CONFIG
SUBSYSTEMS READY NOGO ERROR
ADAC X X X
AFCS X(l) X
AICL X(1) X
AICR WV X
APC X(l) X
ASPJ X X X
BAG X(l) X
BSF X(1 ) X
CADC X(l) X
CIU X X X
DEU X X X
DPl X X X
DP2 X X X
DLS X(l) X
DSS X X
EMSPl X X
EMSP2 X X
IFB WV X
IFI X
IFX X(l) X
e INS X X X
IRSTS X X X
JTIDS X X
MC1 X X X
MC2 X X X
MFA LEFT X
MFA RIGHT X
RADAR X X
RALT X(l) X
RFP X
RFR X
RWR X X X
SAHRS X X X
SDIS X X X
SMS X X X
TACAN X
TARPS X
wow X
,OTE: (1) Subordinate to the converter interface
unit (CIU), and equipment status is
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F-14D 飞行手册 Flight Manual 3(62)
