MIL-I-81987(AS)
3.4. 1.1
Operating Stabilit y - The equipment shall operate as specified
for not less than 1500 hours or 6 months, whichever comes first, without scheduled
maintenance, realignment, or adjustment of any control not readily accessible to
the operator during normal operation.
3.4.1.2
Life - The equipment shall have a minimum total
Operating
Parts requiring scheduled replacement due to wear
operating life of 10,000 hours.
during the life of the equipment
and, the wearout life of such parts, shall be determined
by the contractor and submitted
to the procuring activity.
Reliability in Mean-Time-Between-Failure (MTBF) - The equip-
3.4.103
m e n t , including any built-in-test provisions, shall have a minimum acceptable
(operating) MTBF (G1) of 750 hours when tested as specified in 4.4.3. The equipment
shall have an inherent design reliability of 1,000 hours, (nominal) MTBF.
3.4.2
Maintainability - The design of the equipment shall include
buiIt-in-test features, modular construction and packaging, and provisions for test
points .
3.4.3
Deleted.
3.4.4
interference Control - The generation of electromagnetic inter-
ference by the equipment and t he vulnerability of the equipment to electromagnetic
interference shall be control led within the Iimits of MlL-STD-461 unless otherwise
specified.
3.4.5
Maintenance Provisions and FieId Testing - Provisions for maintenance
shall be as specified in MIL-T-21200. Specific test points and test facilities shall be
provided to the greatest extent practicable for ease of field testing and maintenance .
3.4.6
Nomenclature and Nameplates - Nomenclature assignment and
nameplate approval for equipment identification shall be in accordance with MIL-N-18307.
Service Conditions - Service conditions (environmental) shall be
3.4.7
in accordance with MIL-T-21200, C lass 2 except as specified herein.
Standard Conditions - The following conditions shall be used to
3.4.8
establish normal performance characteristics under standard conditions and for marking
laboratory bench tests.
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