MIL-PRF-29250C
3.10 Towing vehicle (prime mover). The ILJS shall be compatible with all military tactical
wheeled vehicles of 5-ton (4 536 kg) rating or greater with a pintle. Compatibility shall be
determined by the ability of the ILJS to meet all the requirements stated herein.
3.11 Maintenance characteristics. The ILJS design, together with components and accessories,
shall permit ready access to all items requiring scheduled service or maintenance in the field.
Scheduled service and maintenance shall be accomplished with the use of common tools. The
adjustment of components and accessories shall be accomplished with no disturbance to other
components. Grease fittings shall be easily accessible.
3.12 Transportability. The ILJS shall be capable of being contained on one pallet with
dimensions of 88 inches by 108 inches (2 235 mm by 2 743 mm) (commonly referred to as a 463L
pallet) and of being transported without damage on the ramp pallet position on the C-130 and
C-141 aircraft. It shall also be capable of being transported by worldwide highway, rail, and ship
as specified herein and established by MIL-STD-1366.
3.13 Environmental conditions. The ILJS shall be capable of withstanding and operating in the
following natural environmental conditions:
a. Ambient temperature conditions-storage, transport, operation, and nonoperation shall be -
30 degrees Fahrenheit (°F) to + 120 °F (1 Celsius (°C) to 49 °C).
b. Relative humidity - a relative humidity of not greater than 100 percent.
c. Sand and dust - when exposed to sand and dust as specified in MIL-STD-210 for
operation in close proximity to aircraft.
d. Salt fog - when exposed to any salt fog atmosphere.
3.14 System safety requirements. The ILJS shall have an automatic self-locking fail-safe device
that will prevent an inadvertent or accidental lowering of the ILJS. The fail-safe device must
provide positive stop action in the event of a mechanical as well as a procedural accident and
should activate within 0.0625-inch (1.59 mm). Failure modes to be considered must include
failure at the point of contact between the lifting mechanism and the container (i.e., rack and spur
gear, rack and ratchet pawl, or chain and chain attachment, etc.).
3.15 Human performance engineering. The ILJS design for operation and maintenance shall
provide an environment which fosters effective task performance and personnel safety with
minimum training. The ILJS shall be designed such that all operational and scheduled
maintenance tasks can be completed by personnel from the 5th to 95th percentile male/female
wearing arctic garments which conform to MIL-STD-1472.
3.15.1 Lifting limits. No component of the ILJS shall be greater than the three-man design
weight limits of 227 lb (103 kg) in accordance with MIL-STD-1472. The ILJS shall have
handles, or grasp areas, or both which conform to MIL-STD-1472.
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