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the launcher is located, and a LEFT symbol on the MFD and/or the PDU will
COOLANT LOW or RIGHT COOLANT disappear or the missile will be deselected
LOW advisory to display on the MFD. (unshaded on the MFD, no underline on the
PDU) without accompanying launch motor
• Exact coincidence may not occur. i g n i t i o n . This indicates a misfire has
However, helicopter movement resulting occurred.
in stabilized relative position of MMS LOS
CUE and tracking reticle indicates that Proceed as follows:
the missile and the MMS are tracking the
same target.
1. Position the aircraft so that the missile is
• Momentary breakups in tone indicate that oriented downrange for a period of 10
the missile has a marginal track on the minutes after attempting to fire.
target and should not be fired.
2. Upon landing the aircraft Notify armament • Superelevation is not required when firing personnel who will download the missile after
a Block 1 missile. However, all other 10 minutes have elapsed since misfire
visual and audio constraints apply. occurred. Missile is now the responsibility of
the Explosive Ordnance Disposal (EOD)
personnel.
4-107
TM 1-1520-248-10
LEFT LAUNCHER RIGHT LAUNCHER
1 3 4 2
VIEW LOOKING FORWARD
406947-33
H4443
Figure 4-61. ATAS Missile Launch Sequence
4-79. (CDS2) ISP/ R MCPU FAILURE marginal track of the target and should
BACKUP MODE OPERATION. not be fired. This is particularly important
during the superelevation maneuver.
WARNING a. WEAPON SEL switch Select ATAS.
NOTE
ATAS missiles shall not be launched
when ambient temperature exceeds 140
°F (60 °C). The missile could deflagrate • Do not activate missile until target has when the motor ignites. been identified and engagement i s
imminent. A fully charged coolant bottle
1. CPG. (6000 psi) will provide forty 45-second
engagements.
a. MASTER switch ARMED.
• Low pressure (less than 3500 psi) in the
2. Pilot. coolant bottle causes LOW to display on
the PDU on the side of the PDU that the
NOTE launcher is located.
b. MSL ACTVT switch Press.
• Estimated range must be within missile
capability. c. Maneuver helicopter to ensure target is
• The CPG should monitor missile tone centered inside ATAS target acquisition
during the engagement process for reticle.
momentary breakups in tone. Breakups in
tone indicate that the missile has a
4-108
TM 1-1520-248-10
d. WPN-FIRE switch Press to first detent
and hold. a. Weapon Controls.
NOTE Weapon controls are shown in figure 4-62. Control/
indicator functions are shown in figures 4-63 and 4-64.
• Exact coincidence may not occur. A
displaced tracking reticle which moves b. Weapon Configuration.
with the target, accompanied by a high
uninterrupted tone, indicates missile The HELLFIRE missile system can be configured for
track. operation by pressing the WEAPON SEL switch up
• Momentary breakups in tone indicate that selecting the WEAPONS PAGE (fig. 4-65). The CPG
the missile has a marginal track on the can call up the WEAPONS PAGE by positioning the
target and should not be fired. WPN/ASE switch momentarily to the WPN position on
the CPG panel.
e. Verify Tracking reticle coincident with
target, uninterrupted high missile tone. c. HELLFIRE BIT.
f. Pitch attitude Super-elevate helicopter
until bottom of tracking reticle meets The HELLFIRE BIT is selected by pressing L-1 on the
s u p e r e l e v a t i o n l i n e s o n P D U o r WEAPONS BIT/SET-UP PAGE ( f i g . 4-66). The
superelevation cue is aligned with the top of HELLFIRE BIT routine checks the remote HELLFIRE
the aircraft reference symbol on the MFD. Electronics (RHE), the launchers, and the missiles. The
Verify high uninterrupted tone. RHE will test only the components that are present.
RHE GO (BIT passed) or RHE NO-GO (BIT failed) will
g. WPN-FIRE switch Press and hold for one be displayed next to HELLFIRE BIT on the MFD. If
second. RHE GO is displayed and no error messages are seen
under the missile symbol the HMS has successfully
3. CPG MASTER switch STBY. passed BIT.
4-80. HELLFIRE MISSILE SYSTEM. (1) If any launcher fails BIT, the launcher fail
The HELLFIRE missile system (HMS) (fig. 4-62) is an message is displayed by placing an X over the missile
air-to-surface, laser guided missile system. The system symbols.
is capable of launching four HELLFIRE missiles at
targets identified by ground or airborne designators. (2) Missile BIT checks and displays the status
The system has a continuous or on-call built-in test and inventory of all installed missiles. The missiles are
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TECHNICAL MANUAL OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPT(123)
