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TM 1-1520-248-10
ON AL
FGL
OFF
WPN
ASE INIT
ON
OFF OFF OFF
LMC
ON
ALE
ON
TIS INTEG
INCR
406075-598
J1465
ATHS MMS
FILTER
ALL
Figure 4-35. (CDS2) CPG Auxiliary Control Panel
ON AL
FGL
OFF
WPN
ASE
IDM
INIT
ON
OFF OFF OFF
LMC
ON
ALE
ON
IDM INIT SWITCH
IMAGE
CAPTURE
TIS INTEG
INCR
406075-1494-9
J0510
Figure 4-36. CPG Auxiliary Control Panel
4-71
TM 1-1520-248-10
4-49. PDU PROCEDURES. if the MASTER switch is in the ARMED
position, electrical power is applied to
the aircraft, and either the Integrated 4-51. ENGINE RUNUP. System Processor (ISP) has failed or
the ISP circuit breaker is pulled.
1. MASTER switch STBY.
• Weapons may be inadvertently
2. Weapon symbology Displays within 20 fired while the aircraft is on the ground
seconds. if the MASTER switch is in the ARMED
position, electrical power is applied to
3. PDU height and brightness Adjust to the aircraft, and either the right master
desired level. controller processor unit (R MCPU) has
failed or the R MCPU circuit breaker is
4. PDU TEST button Press. pulled.
5. PDU display Verify: The ACP (fig. 4-40) allows arming and safing of all
weapon systems. The final arm signal/power is
a. TEST appears. provided by selecting the weapon system with the
WEAPON SEL switch. The ACP is located on the
b. PASS appears. center pedestal and receives power from the DC
essential bus, circuit protection is provided by the
c. Weapon symbology appears. ARMT CONTR circuit breaker located on the aft center
circuit breaker panel.
4-52. ARMAMENT CONTROL PANEL.
WARNING
• (CDS2) Weapons may be inadvertently
fired while the aircraft is on the ground
Figure 4-37. Pilot Display Unit (PDU)
4-72
TM 1-1520-248-10
Figure 4-38. PDU Symbology
4-73
TM 1-1520-248-10
406704-116
G7848
TEST
FAIL:
PDU
EU
PASS
PDU BIT IN PROGRESS PDU BIT COMPLETED SUCCESSFULLY
PDU BIT COMPLETED UNSUCCESSFULLY
FOLLOWED BY FAILED COMPONENTS
Figure 4-39. PDU BIT Sequence
4-74
TM 1-1520-248-10
CONTROL/INDICATOR FUNCTION
1. LEFT JETTISON Jettisons left weapon system. When the gun is installed, the jettison
system will be electrically and mechanically prevented from firing.
2. RIGHT JETTISON Jettisons right weapon system.
3. MASTER control switch The MASTER switch must be in the STBY or ARMED position prior to
selecting a weapon system with the WEAPON SEL switch to complete the
firing circuit.
OFF All armament circuits de-energized.
STBY Energizes armament circuits except weapon firing circuits. Energizes GUN
switch for recocking or safing.
Figure 4-40. Armament Control Panel (ACP) Controls/Indicators (Sheet 1 of 2)
4-75
TM 1-1520-248-10
(Cont)
CONTROL/INDICATOR FUNCTION
ARMED Energizes the selected weapon firing circuit when ARMED is indicated on
the ACP and MFD. To arm the gun the GUN switch must also be placed
in the ARMED position.
4. ARMED/STBY indicator
ARMED Illuminates when MASTER switch is in the ARMED position.
STBY Illuminates when MASTER switch is in the STBY position.
5. GUN switch SAFE and RECOCK positions will not function unless MASTER switch is
placed in STBY or ARMED.
SAFE Extracts round from chamber and secures bolt in the aft position.
RECOCK Recocks gun cycling bolt aft ejecting a round then moving forward feeding
another round into the chamber.
ARMED Arms gun circuits when MASTER switch is ARMED, weapon is selected,
and ARMED is indicated on the ACP and MFD.
Figure 4-40. Armament Control Panel (ACP) Controls/Indicators (Sheet 2 of 2)
4-76
TM 1-1520-248-10
4-53. UNIVERSAL WEAPONS PYLON. flexible feed chute. The storage can is mounted to hard
points on the left side of the fuselage. The ammunition
Expandable bolts and quick-disconnect electrical feed and storage system holds approximately 500
connectors provide for quick removal and installation of rounds. The ammunition is gravity fed through the
the universal weapons pylon (UWP) (fig. 4-41). One flexible feed chute to the gun.
UWP is installed in each side of the intermediate
fuselage. b. Weapon Controls. Weapon controls are shown
The universal weapons pylon features a hinge fitting in figure 4-42. Control/indicator functions are shown in
which allows the pylon to be folded reducing space figures 4-43, 4-44, and 4-45.
required for storage and transport. c. Weapon Configuration. The .50 caliber machine
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TECHNICAL MANUAL OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPT(113)
