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Warning, Caution, and Advisory messages and required
actions for CDS2 and CDS3.
Tables 9-4 through 9-6 provide a complete list of
Warning, Caution, and Advisory messages and required
actions for CDS4.
9-2. IMMEDIATE ACTION EMERGENCY
STEPS.
Those steps that must be performed immediately in an
emergency are underlined. These steps must be
performed without reference to the checklist. When the
situation permits, non-underlined steps will be
accomplished with use of the checklist. If time permits
during a critical emergency, transmit a MAYDAY call,
set transponder to emergency, jettison external stores/
external cargo (if appropriate), and lock shoulder
harnesses.
NOTE
The urgency of certain emergencies
requires immediate and instinctive action by
the pilot. The most important single
consideration is helicopter control. All
procedures are subordinate to this
requirement.
9-3. DEFINITION OF EMERGENCY TERMS.
For the purpose of standardization, the following
definitions shall apply:
a. The term LAND AS SOON AS POSSIBLE is
defined as executing a landing at the nearest suitable
landing area (e.g., open field) without delay. (The
primary consideration is to assure the survival of the
occupants.)
b. The term LAND AS SOON AS PRACTICABLE is
defined as executing a landing at a suitable landing
area. (The primary conslderatlen Is the urgency of the
emergency.)
c. The term AUTOROTATE is defined as adjusting
the flight controls as necessary to establish an
autorotational descent and landing.
d. The term EMER SHUTDOWN is defined as
engine shutdown without delay as follows.
1. Throttle - Close.
2. FUEL VALVE handle - OFF.
WARNING
Complete loss of DC power will result in
a loss of rotor RPM indications.
NOTE
Before turning the battery switch off durrng
in-flight emergencies requiring EMER
SHUTDOWN, the pilot should consider
MAYDAY call, transponder emergency, and
the possible adverse effects of total
electrical failure. The loss of all CDS
indications will occur.
3. BATT switches - OFF.
9-1
TM 1-1520-248-10
I TABLE 9-1. (CDS2/CDS3) WARNING MESSAGES AND ACTIONS REQUIRED
WARNING ACTION
ENGINE OUT Verify condition, Autorotate.
ENG OVER TRQ Verify condition, LAND AS SOON AS POSSIBLE.
(CDS3) FADEC FAIL Refer to FADEC failure emergency procedure.
(CDS3) FADEC MANUAL Refer to FADEC failure emergency procedure.
HIGH RPM
(CDS3) LOW FUEL PRES
LOW RPM ROTOR
TGT OVER TEMP
XMSNOVERTRQ
Verify condition, Adjust collective.
LAND AS SOON AS SOON POSSIBLE.
Verify condition, Adjust collective.
Verify condition, LAND AS SOON AS POSSIBLE.
Verify condition, LAND AS SOON AS POSSIBLE.
I TABLE 9-2. (CDS2/CDS3) CAUTION MESSAGES AND ACTIONS REQUIRED
CAUTION ACTION
AC GEN FAIL Refer to emergency procedure.
ADU FAIL Refer to emergency procedure.
1 BATT CHGR FAIL Information/system status.
CHIPS ENG FREEWHEEL If no successful burnoff - LAND AS SOON AS POSSIBLE.
CHIPS ENG LOWER LAND AS SOON AS POSSIBLE.
CHIPS ENG UPPER LAND AS SOON AS POSSIBLE.
CHIPS T/R GRBX If no successful burnoff LAND AS SOON AS POSSIBLE.
CHIPS XMSN SUMP If no successful burnoff - LAND AS SOON AS POSSIBLE.
CHIPS XMSN UPPER If no successful burnoff - LAND AS SOON AS POSSIBLE.
DC GEN FAIL Refer to emergency procedure.
EGI FAIL Refer to emergency procedure.
* ENG TRQ TIME LIM [ ] Adjust collective.
FUEL BOOST FAIL Refer to emergency procedure.
FUEL CONT Refer to emergency procedure.
FUEL FILTER BYP LAND AS SOON AS POSSIBLE.
FUEL LOW LAND AS SOON AS PRACTICABLE.
GPS DIVERGENT Refer to emergency procedure.
HF RADIO FAIL Information/system status.
HIGH OIL PRESS ENG LAND AS SOON AS PRACTICABLE.
9-2
TABLE 9-2. (CDS2/CDS3) CAUTION MESSAGES AND ACTIONS REQUIRED (Cont)
CAUTION
HIGH OIL TEMP ENG
HIGH OIL TEMP XMSN
HIGH TEMP T/R GRBX
*HIGH TGT TIME LIM [ ]
HOT BATT 1
HOT BATT 2
HOT BATT 1 & 2
(CDS3) HOT BATT 1, 2
IFF FAIL
IFF MODE 4 FAIL
INS FAIL
INV FAIL
IR JAMMER INOP
(CDS2) ISP FAIL
LEFT MCPU FAIL
(CDS3) LOW ALTITUDE
LOW HYD PRESS
LOW OIL PRESS ENG
LOW OIL PRESS XMSN
LOW OIL QUANTITY ENG
*MAST TRQ TIME LIM [ ]
MISSILE UNLATCHED
OIL BYP ENG
P/R DISENG
RECT FAIL
RIGHT MCPU FAIL
SCAS DISENG
(CDS2) * TGT 5 MIN LIM [ ]
* TGT 30 MIN LIM [ ]
(CDS3) WEAPONS FAIL
YAW DISENG
ACTION
Refer to emergency procedure.
LAND AS SOON AS POSSIBLE.
　
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