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|  MIL-V-62475(AT)
g. Stow interlocks. It shall be verified that the targeting station shall not go into stow
position when the EL STOW and AZ STOW indicators are not illuminated, indicating
that the proper stow position has not been achieved. The override function shall not
allow the head to be stowed.
h. G/VLLD mount interlock. It shall be verified that turret motion is not allowed when the
G/VLLD mount is unlocked. It shall be verified that the override function shall sound the
alarm and allow turret motion.
i. Erect lock interlock. It shall be verified that turret motion is not allowed when the
erection locks are not in. It shall be verified that the override function shall sound the
alarm and allow turret motion.
4.6.4.29 Operating conditions.
4.6.4.29.1 Climate, shock and vibration. To determine conformance to 3.5.30.1 and
3.5.30.2, the FISTV vehicle shall be operated in specified environments and observed for
performance requirements.
4.6.4.30 Survivability.
4.6.4.30.1 Armament. To determine conformance to 3.5.31.1, it shall be verified that the
gun pintle mount, when moved across the traversing rail, shall be free of binding. It shall also be
verified that the locking device secures the mount at any position along the traversing rail.
4.6.4.30.1.1 Pintle mount. To determine conformance to 3.5.31.1.1, it shall be verified that
the mount shall not move with a force of up to 45 lbs (200 N). After breakaway, the force
applied parallel to the traversing rail at the machine gun pintle mount shall be measured to be
15 lbs (67 N) or less.
4.6.4.30.2 Ventilated face mask. To determine conformance to 3.5.31.2, the M39 air flow
tester shall be used to verify flow rate at each of the four hoses. The heater shall be turned on
and the temperature of the air shall be as specified.
4.6.4.30.3 Smoke grenade system test. To determine conformance to 3.5.31.3, the grenade
launcher power selector shall be placed "ON" and illumination of the indicator shall be verified.
The voltage between grenade terminals on the grenade launcher shall be measured when the
firing switches are activated. Voltage shall be as specified.
4.6.4.30.4 EMI/EMC. To determine conformance to 3.5.31.4, the specified tests in
MIL-STD-462 shall be performed and compliance shall be verified.
4.6.4.30.5 EMP. To determine conformance to 3.5.31.5, the FISTV vehicle shall be
subjected to verification reference Detailed Test Plan, Nuclear Effects Subtest of Development
Test II (PQT-G) of FISTV, Annex A, October 1982 (confidential).
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