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|  MIL-T-62531(AT)
2.3 Order of precedence. In the event of a conflict between the text of this specification and
the references cited herein (except for associated detail specifications, specification sheets or
MS standards), the text of this specification shall take precedence. Nothing in this specification,
however, shall supersede applicable laws and regulations unless a specific exemption has been
obtained.
2.3.1 Safety precedence. Nothing in this specification shall supercede the requirements of
MIL-STD-1180 unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 First article. Unless otherwise specified (see 6.2), the contractor shall furnish _________
which shall be subjected to first article inspection (see 4.1.7). First article inspection vehicle,
properly marked with identifying information shall be representative of the unit to be furnished
to the Government. All subsequent vehicle(s) delivered to the Government shall conform to
these samples in all of their pertinent physical and performance attributes.
3.2 Materials. Materials shall be as specified herein and in referenced specifications,
standards and drawings. Material shall be free of defects which affect performance or
serviceability of the finished product (see 4.3).
3.3 Qualified products. The contractor shall be responsible for using parts and assemblies
from Qualified Products List (QPLs) whenever applicable. Contractor's inspection records shall
specifically list all QPL items by number and date of the QPL, name of supplier and part or
drawing number(s). When parts and assemblies are approved as qualified products, but not yet
listed on the QPL, the contractor shall list the products by number and date of the approved
document and name of supplier(s) (see 4.3).
3.4 Kits.
3.4.1 Special kits. Provisions shall be made for installation of special kits including
winterization equipment. When specified (see 6.2), special kits shall be furnished as equipment.
Special kits, when installed, shall fit properly without interference or misalignment and meet
applicable environmental and performance requirements specified herein.
3.4.1.1 Arctic kit. Arctic kits 3.4.1.1.1 through 3.4.1.1.7 shall assure engine starting,
operational performance, and provide protection for personnel in ambient temperatures from a
minus 32C measured 1.2 to 1.8 meters above ground, to a minus 54C, measured at ground
level.
3.4.1.1.1 Engine coolant heater kit. The engine coolant heater kit furnished shall be in
accordance with drawing ____________. When installed, the engine coolant heater kit shall
assure engine starting and operation in ambient temperatures from minus 32C to minus 54C.
3.4.1.1.2 Radiator and hood cover kit. The radiator and hood cover kit furnished shall be in
accordance with drawing ______________. This kit shall be used in conjunction with the
engine coolant heater kit.
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