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(only one mission computer operational), it will support
all the OBC functions that are normally provided in a
full-up mode (i.e., both mission computers operational).
38.3.3.1 MFD OBC Formats. There are several
different types of OBC formats: basic, functional group,
fail data, maintenance, and failure history tile. Figure
38-8 identifies the equipment that can be commanded to
test, or masked, Tom each of the format types.
Figure 38-9 identities all possible OBC failure acronyms
and failure history tile acronyms that are displayed
on OBC formats. It also provides an explanation and
possible action that the aircrew can take in responset o
the fault.
38.3.3.1.1 OBC Basic. The OBC basic format displays
failures at the subsystem level and provides the
capability to initiate the OBC sequencete sts.A dditional
information for a subsystem failure can be found on the
corresponding functional group format. Each acronym
that appearso n the OBC basic format indicatest hat the
subsystemis not currentlyo perational.E acha cronyma p
pearsi n a dedicatedlo cation as shown in Figme 38-10.
38.3.3.1.2 Functional Group Formats/Fail Data
Format. The OBC functional group format display
failures are at the WFW level. Additional information
for a WRA failure can be found on the corresponding
fail data format for that functional group. Subsystem
failure status is indicated as either NO GO, NOT
READY, or CONFIG for each subsystem in the functional
group. -Refer to Figure 38-5 for failure status
types. When the status is NOT READY for a subsystem
on the bus, the WRA corresponding to the remote terminal
(i.e., the WRA that directly communicates on
the bus with the MCS) is displayed subordinate to the
subsystem.
A prompt (* NEXT PAGE *) on the bottom of an
OBC fonctional group format (or a fail data format)
appears if there are additional failure acronyms for the
group or additional fail data pages. Pressing the PAGE
pushbuttoni n responseto the prompt will causet he next
page of information to be displayed. Paging past the last
page will cause the fmt page to be displayed again.
Fail data information is only displayed on a fail data
format after at least one commanded BIT has been performed
for the applicable subsystem.
Note
Fail data is available for display continuously
for CADC, EMSP 1, and EMSPZ.
Otherwise, if commanded bit has not been performed,
a prompt will be displayed on the fmt line of the fail
data format as FAIL DATA NOT AVAILABLE for the
applicable WR4 or system.
38.3.3.1.3 Failure Acronym Masking. Masking
removes or inhibits display of OBC equipment failure
acronyms for known WRA faults. Failure acronyms will
be removed from the OBC formats (basic and functional
group) and from the TID OBCCM window regardless
of the mode of BIT that detected the failure. Failure
acronyms are maskable at the OBC basic level, where
all currently failed equipment is affected, and also at the
timctional grouptit level, where only equipment in the
functional group is affected, Failure acronyms may also
be unmasked in order to cause their redisplay after having
been previously masked. Unmasking is initiated
with OBC formats or by the system as a result of performing
commanded BIT. Whichever level of masking/
unmaskingi s selected,a ll the correspondinge quipment
appearingo n the OBC basic, OBC functionalg roup,a nd
ORIGINAL 3840
NAVAIR 0%F14AAD-1
FLIGHT STATUS
‘REFLIGHT
weight-on-wheels, TASc76 KTS,
4TP set to OBC. Parking brake set)
TEST SELECTS
Preflight test
EQUIPMENT TESTED
(1) CIU, CADC, APC,
IFB, ADAC, DSS, SM
SDIS, IRST, JTIDS
AFCS, AICS, RALT,
S, (1) DLB, BSF, (2)
Retest test
Weight-on-wheels, parking brake
et)
in/eight-on-wheels, TAB.<76 KTS)
Indiiidual/group test
Individual/group test
Individual/group test
Retest test
(1) CIU, ADAC. DSS, DEU, SMS, (3) ASPJ,
(NON-RADIATE), SDIS, IRST
(1) CIU, CADC, APC, AFCS, AICS
(3) INS, SAHRS, JTIDS
RALT
ADAC, DSS, DEU, SMS, (2) ASPJ
(NON-RADIATE), SDIS, IRST
\IFLIGHT lnflight test
weight-off-wheels, TAS>=76 KTS)
IFB, DEU, IFX, BAG, SMS, (1) DLS, (2)
ASPJ (RADIATE), MFA LEFT/RIGHT, SDIS,
IRST
Individual/group test
Retest test
BAG, IFX, (3) ASPJ (RADIATE)
ADAC, DSS, DEU, SMS, (2) ABPJ
(RADIATE), SDIS, IRST
,reflight/lnflight Individual/group test (4) DPl, (4) DP2, DEU, IFB, (5) MCI, (5)
MC2, ADAC, (6) DSS, SMS, (1) DLS, SDIS,
IRST
Retesl test ADAC, DSS, DEU, SMS, SDIB, IRST
　
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