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warning condition occurs, the following cautions will not
be recorded on C/W HISTORY: INV FAIL
IR JAMMER INOP
AC GEN FAIL (CDS2) ISP FAIL
CHIPS ENG FREEWHEEL LEFT MCPU FAIL
CHIPS XMSN SUMP (CDS3) LOW ALTITUDE
CHIPS XMSN UPPER LOW HYD PRESS
DC GEN FAIL LOW OIL PRESS ENG
(OH-58D) FUEL CONT LOW OIL PRESS XMSN
INV FAIL LOW OIL QUANTITY ENG
RECT FAIL * MAST TRQ TIME LIM [ ]
The following is a complete list of cautions: MISSILE UNLATCHED
OIL BYP ENG
AC GEN FAIL P/R DISENG
ADU FAIL RECT FAIL
2-56
TM 1-1520-248-10
RIGHT MCPU FAIL CARGO HOOK ARMED
SCAS DISENG * (CDS2) CHECK MESSAGE CHECKALL
*, ** (CDS2) TGT 5 MIN LIM [ ] * (CDS2) CHECK MESSAGE CHECKFIRE
*, ** TGT 30 MIN LIM [ ] * (CDS2) CHECK MESSAGE MAYDAY
(CDS3) WEAPONS FAIL CODE NOT ACCEPTED
YAW DISENG DTS FAIL
* EGI BATT LOW
NOTE
ENG ANTI-ICE ON
• * Brackets next to a caution display the EXT PWR
accumulated time in seconds that the limit * (CDS3) FADEC DEGRADE
was exceeded. * (CDS3) FADEC MAINT
• **These TGT cautions have a built-in (CDS3) FM-1 CT FAIL
hysteresis that requires the TGT to be
lower than the limit by 30 °C in order to FM-1 CUE
reset the caution timer (a system variation FM-1 FAIL
of ±10 °C is possible).
(CDS3) FM-1 HUB LOW
c. Advisory Function. Advisory messages are (CDS3) FM-1 PT FAIL
displayed in a similar manner as caution messages.
When an advisory condition occurs, a single “bong” (CDS3) FM-2 CT FAIL
may sound in the crew headsets and the advisory FM-2 CUE
message will be displayed in the box at the bottom of
the MFD screen. The one exception, the HDG HLD FM-2 FAIL
advisory, is displayed in the upper left corner of the (CDS3) FM-2 HUB LOW
screen and no bong is heard. Pressing the REC/ACK
switch to the ACK position will delete the message from (CDS3) FM-2 PT FAIL
the screen. When an advisory has been acknowledged, (OH-58D) FUEL CONTROL
it will stay in memory as long as the advisory condition
exists. The total number of active advisories is * (CDS3) GPS DIVERGENT
displayed to the right of the letter A at the bottom of the * GPS FAIL
screen. Advisories are not recorded in C/W HISTORY.
* HDG HOLD
The following advisory messages can be displayed:
HF RADIO FAIL
NOTE HF RADIO TUNE
* (CDS3) HVR DEGRADED
* These advisories will generate a single
bong advisory tone. (CDS3) IDM FAIL
IFM FAIL
* (CDS3) ALARM (CDS3) IMAGE RECEIVED
* ALARM ONE INVALID COMMAND
(CDS3) ASE FAIL KY-75 ALARM
(CDS2) ATH AUTHENT TABLE LOW LASER CODE MISMATCH
(CDS2) ATH MESSAGE RECEIVED LAUNCHER SAFED
(CDS2) ATHS FAIL * LEFT COOLANT LOW
* (CDS2) ATHS QUEUE FULL * LEFT LAUNCHER FAIL
BATT PREHEAT ON * MISSILE ALERT
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TM 1-1520-248-10
NOTE WPN NOT ARMED
(CDS3) WPN NOT SELECTED
* These advisories will generate a single
bong advisory tone.
NOTE
* MISSILE ALERT AI All advisory messages are inhibited during
* MISSILE ALERT SAM start.
MMS FAIL
2-85. (CDS4) WARNING, CAUTION, AND
MMS VIDEO NOT AVAILABLE ADVISORY SYSTEM.
MOIST VTR TAPE
The warning, caution, and advisory system visually and
NAV INVALID audibly advises the crew of specific faults in the
NAV NOT ALIGNED helicopter systems. All warning, caution, and advisory
messages are displayed on both MFDs and warnings
* NAV UPDT REQUIRED and cautions are accompanied by an audio tone that is
* (CDS3) NO AUTO START heard through the crew headsets.
NO CODE a. Warning Function. Warning messages are
* ONE YAW CHAN OFF displayed in a box in the upper right corner of both
MFD screens (fig. 2-25). This box will display only
PITOT HEAT ON when there is an active warning condition. There are
* P(Y) CODE INVALID eight warning messages that can be displayed,
prioritized as follows:
RHE FAIL
* RIGHT COOLANT LOW ENGINE OUT
* RIGHT LAUNCHER FAIL LOW RPM ROTOR
(CDS3) RMS FAIL LOW FUEL PRES
(CDS3) SCAN NOT AVAILABLE FADEC FAIL
TACAN FAIL HIGH RPM
TACAN INVALID XMSN OVER TRQ
* (CDS3) TACFIRE AUTH TABLE LOW ENG OVER TRQ
* (CDS3) TACFIRE MSG # TGT OVER TEMP
* (CDS3) TACFIRE MSG CHKALL (1) In addition there is a ninth warning that is only
* (CDS3) TACFIRE MSG CHKFIRE presented to the crew as a 3-Hz warning tone:
* (CDS3) TACFIRE MSG MAYDAY
* (CDS3) TACFIRE QUEUE FULL Low Altitude
* (CDS3) TIMER (2) Refer to Chapter 9, Emergency Procedures,
for corrective action for each of these warnings. When
* (CDS2) TIMER ONE a warning condition occurs, the warning is displayed,
UHF FAIL accompanied by a warning audio. The FADEC FAIL
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TECHNICAL MANUAL OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPT(31)
