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SCAS DISENG may sound in the crew headsets and the advisory
message will be displayed in the box at the bottom of
* TGT 30 MIN LIM [ ] the MFD screen. One exception, HDG HLD, is
WPN NOT ACTIONED displayed in the upper left corner of the screen and no
bong is heard. Pressing the REC/ACK switch to the
WEAPONS FAIL ACK position will delete the message from the screen.
YAW DISENG In addition to the single “bong” tone associated with
advisory messages, a missile alert tone is generated
NOTE whenever the MISSILE ALERT SAM or MISSILE
ALERT AI advisory occurs. The missile alert tone
• * Brackets next to a caution display the cfroenqsuiestnsc yo fe ave r1y2 5290 Hmzi lltiosneeco tnhdast. cThhainsg etosn eto cah alonwgeesr
accumulated time in seconds by which the frequency 10 times and repeats until acknowleged.
limit was exceeded. When an advisory has been acknowledged, it will stay
• The following cautions are inhibited during in memory as long as the advisory condition exists. The
engine start: total number of active advisories is displayed to the
right of the letter A at the bottom of the screen.
Advisories are not recorded in C/W HISTORY. Advisory
AC GEN FAIL messages are prioritized and are always displayed in
BATT CHGR FAIL their prioritized order.
2-60
TM 1-1520-248-10
The following is a complete list of advisory IFM FAIL
messages: * IMAGE RECEIVED
NOTE INVALID COMMAND
LASER CODE MISMATCH
* Accompanied by a single ‘bong‘ i n
crewmember headsets. LAUNCHER SAFED
LEFT COOLANT LOW
AIR MSN REJECTED LEFT LAUNCHER FAIL
AIR MSN X UPDATE ** MISSILE ALERT
AIR REQST MSN ** MISSILE ALERT AI
* ALARM (alarm name) ** MISSILE ALERT SAM
ARTY MSN X UPDATE MMS FAIL
ASE FAIL MOIST VTR TAPE
BATT PREHEAT ON NAV INVALID
BSA UPDATE NAV NOT ALIGNED
C2 MSG RCVED * NAV UPDT REQUIRED
CARGO HOOK ARMED NET JOIN? FMx
CODE NOT ACCEPTED * NO AUTO START
DTS FAIL NO CODE
* EGI BATT LOW NO VIXL NET
ENG ANTI-ICE ON * ONE YAW CHAN OFF
EXT PWR PITOT HEAT ON
* FADEC DEGRADE * P(Y) CODE INVALID
* FADEC MAINT RHE FAIL
FM-1 CT FAIL RIGHT COOLANT LOW
FM-1 CUE RIGHT LAUNCHER FAIL
FM-1 FAIL RMS FAIL
FM-1 HUB LOW TACAN FAIL
FM-1 PT FAIL TACAN INVALID
FM-2 CT FAIL TACFIRE AUTH TABLE LOW
FM-2 CUE * TACFIRE MSG NO
FM-2 FAIL * TACFIRE MSG CHKALL
FM-2 HUB LOW * TACFIRE MQSG CHKFIRE
FM-2 PT FAIL * TACFIRE MSG MAYDAY
GPS DIVERGENT TACFIRE QUEUE FULL
* GPS FAIL * TIMER (timer name)
* HVR DEGRADED UHF FAIL
IDM FAIL VDU FAIL
IDM NO STARTUP VHF FAIL
IDM SHUTDOWN CMPLT VTR FAIL
2-61
TM 1-1520-248-10
VTR TAPE FULL 1. Rotor speed (NR) and power turbine speed
WEDGE CONSTANT ZERO (NP).
WPN NOT ACTIONED 2. Fuel quantity (FUEL QTY) and engine torque
WPN NOT ARMED (ENG TRQ %).
* Accompanied by a single ‘bong‘ in crewmember 3. AC voltage (ACV) and rectifier voltage (RECT
headsets. V).
** Accompanied by missile alert tone.
4. Rectifier load (RECT LD %) and starterNOTE
generator load (S GEN LD %).
5. Battery voltage (BATT V) and starter voltage
• A l l advisory messages except the (START V).
following are inhibited during engine start:
FADEC DEGRADE a. TEST/DGT/OFF Switch. A TEST/DGT/OFF
switch allows selection of the subsystem test mode and
FADEC MAINT also permits all digital displays to be de-energized at
the operators discretion. When the TEST function is
NO AUTO START
actuated, a test mode is initiated to verify proper
• I f multiple warnings, cautions, and subsystem operation. The VSDS subsystem (three
advisories occur at the same time, the units) is functioning properly if all vertical scales go to
priority of tones is as follows: full deflection and the digital displays indicate all 8’s
with exception of the left numeral on the NG display
which should indicate “1”. Also, the WRN indicator and
a. Low RPM rotor
position indicator on the selectable display should
b. Warning tone illuminate. The test mode may be utilized as a preflight
c. FADEC tone check or whenever verification of subsystem operation
is required.
d. Missile alert tone
b. WRN Indicator Light. A WRN indicator light is
e. Caution tone provided to indicate a subsystem malfunction. When
f. Advisory tone the WRN indicator illuminates, the BIT/RST switch
should be actuated to RST to see if the fault will clear.
If the fault does not clear, maintenance action is
2-86. MULTIPARAMETER DISPLAY (MPD). required.
NOTE c. BIT/RST Switch. Actuation of the BIT/RST
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TECHNICAL MANUAL OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPT(33)
