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warning consists of a high/low tone. The LOW RPM
(CDS3) VDU FAIL ROTOR warning consists of a continuous whoop. The
VHF FAIL audio signal for all other warnings is a continuous 3
bongs per second. The audio signal can be silenced by
VTR FAIL moving the REC/ACK (recall/acknowledge) switch (3,
VTR TAPE FULL fig. 2-9) on the MFK to the ACK position. The warning
message will remain displayed on the MFD for a
WEDGE CONSTANT ZERO minimum of 3 seconds or as long as the warning
WPN NOT ACTIONED condition is active. The warning box can be temporarily
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TM 1-1520-248-10
removed from the MFD display by holding the REC/ display list. Caution messages are prioritized and
ACK switch in the ACK position. When the helicopter is always displayed in their prioritized order. All caution
on the ground, the ENGINE OUT, LOW RPM ROTOR, messages, except FADEC MANUAL, are recorded in C/
and LOW FUEL PRES warnings can be deleted by W HISTORY except when an ON GROUND condition
pressing the REC/ACK switch a second time. exists. If an ENGINE OUT warning condition occurs,
the following cautions are inhibited:
All warning messages are recorded in C/W (Caution/
Warning) HISTORY, except when the helicopter is on
the ground. When the ENGINE OUT warning occurs, AC GEN FAIL
the following warnings will be inhibited: ADU FAIL
CHIPS ENG FREEWHEEL
ENG OVER TRQ
CHIPS ENG LOWER
TGT OVER TEMP
CHIPS ENG UPPER
XMSN OVER TRQ
DC GEN FAIL
NOTE EGI FAIL
GPS DIVERGENT (advisory message)
The following warnings are inhibited during
engine start: IFF FAIL
• TGT OVER TEMP (TGT less than 927 °C) INS FAIL
• LOW RPM ROTOR INV FAIL
• HIGH RPM IR JAMMER INOP
• XMSN OVER TRQ RECT FAIL
The following is a complete list of cautions:
b. Caution Function. All caution messages are
displayed in either of the two boxes that will display NOTE
across the bottom of the MFD screen (fig. 2-25). These
boxes display only when there is an active caution or * Brackets next to a caution display the
advisory message that has not been acknowledged or accumulated time in seconds by which the
has been recalled. Refer to Chapter 9, Emergency limit was exceeded.
Procedures, for a list of, and corrective actions to be
taken for, these conditions. When the caution condition
occurs, the caution message displays the word AC GEN FAIL
CAUTION in the upper left portion of the screen and a ADU FAIL
one “bong” per second audio signal will sound in the
crew headsets. For FADEC MANUAL, the FADEC BATT CHGR FAIL
warning tone will sound. The total number of active CHIPS ENG FREEWHEEL
cautions will display to the right of the letter “C” on the
CHIPS ENG LOWER
bottom of the screen. Pressing the REC/ACK switch on
the MFK (fig. 2-9) one time to the ACK position will CHIPS ENG UPPER
delete CAUTION from the screen and silence the CHIPS T/R GEARBOX
audio. Pressing the switch a second time will delete the
messages from the screen if there are five or fewer CHIPS XMSN SUMP
active caution and/or advisory messages. If there are CHIPS XMSN UPPER
more than five active messages, (number of messages)
MORE MESSAGE will display on the last line of the DC GEN FAIL
right box. In this case, pressing the REC/ACK switch a EGI FAIL
second time will display the remaining messages, up to
five. This continues until all active messages are * ENG TRQ TIME LIM [ ]
displayed. All messages will be stored in memory and FADEC MANUAL
can be recalled by pressing the REC/ACK switch to
REC position. Caution messages have priority over FUEL BOOST FAIL
advisory messages and will precede them on the FUEL FILTER BYP
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TM 1-1520-248-10
FUEL LOW DC GEN FAIL
HIGH OIL PRESS ENG EGI FAIL
HIGH OIL TEMP ENG FUEL FILTER BYP
HIGH OIL TEMP XMSN HIGH OIL PRESS ENG
HIGH TEMP T/R GRBX HIGH OIL TEMP ENG
* HIGH TGT TIME LIM [ ] HIGH TEMP T/R GRBX
HOT BATT 1 HOT BATT 1
HOT BATT 1, 2 HOT BATT 2
HOT BATT 2 HOT BATT 1, 2
IFF FAIL IFF FAIL
IFF MODE 4 FAIL IFF MODE 4 FAIL
INS FAIL INS FAIL
INV FAIL INV FAIL
IR JAMMER INOP LEFT MCPU FAIL
LEFT MCPU FAIL
LOW HYD PRESS
LOW HYD PRESS
LOW OIL PRESS ENG
LOW OIL PRESS ENG
OIL BYP ENG
LOW OIL PRESS XMSN
P/R DISENG
LOW OIL QUANTITY ENG
RECT FAIL
* MAST TRQ TIME LIM [ ]
RIGHT MCPU FAIL
MISSILE UNLATCHED
SCAS DISENG
OIL BYP ENG
YAW DISENG
P/R DISENG
RECT FAIL c. Advisory Function. Advisory messages are
displayed in a manner similar to caution messages.
RIGHT MCPU FAIL When an advisory condition occurs, a single “bong”
　
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