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|  MIL-T-48578(MU)
4.4.3.3 System interruption. - A system interruption is any system
malfunction for which the trainer is operable within the limits set forth in
this specification but required maintenance to correct the malfunction.
Although a system interruption does not penalize the reliability, it may
constitute a failure of some major subassembly or component for which
system acceptance cannot be made until that characteristic or component
which caused the system interruption has been screened. Subsequent to
the Reliability/FAT, the sample systems shall be refurbished and readied
for delivery and shipment.
4.4.4 Failure of sample. - Should any one item of a special sampling
fail to meet the specified test requirements, acceptance of the represented
inspection lot will be suspended by the Government until necessary
corrections have been made by the contractor and resubmitted items have
been approved (see 4.3.3).
4.5 Inspection equipment. - Except as otherwise provided for by the
contract, the contractor shall supply and maintain inspection equipment in
accordance with the applicable requirements of MIL-I-45607.
4.5.1 Government furnished inspection equipment. - Where the
contract provides for Government test equipment, supply and maintenance
of test equipment shall be in accordance with the applicable requirements
specified in MIL-I-45607. An M55 laser gunnery trainer (FSN 6920-689-4036)
shall be provided to the contractor for use in the performance, vibration
and shock testing.
4.5.2 Contractor furnished inspection equipment.
4.5.2.1 Government design. - All inspection equipment specified by
drawing number in specification or SQAP forming a part of the contract
shall be supplied by the contractor in accordance with technical data
included in the technical data package list.
4.5.2.2 Contractor design. - The contractor shall design and
supply inspection equipment compatible with the "Test Methods and
Procedures" specified in 4.6 of this specification and with the component
inspection procedures specified in "Examination" and ""Test Facilities"
requirements of MIL-F-13926. Since tolerance of test equipment is normally
considered to be within 10% of the product tolerance for which it is
intended, this inherent error in the test equipment design-must be
considered as part of the prescribed product tolerance limit. Thus, Thus ,
concept, construction, materials, dimensions and tolerances used in the
design of test equipment shall be so selected and controlled as to
insure that the test equipment will reliably indicate acceptability of
a product which does not exceed 90% of the prescribed tolerance limit, and
permit positive rejection when non-conforming. Construction shall be such
as to facilitate routine calibration of test equipment.
4.5.3 Inspection equipment design requirements.
4.5.3.1 Target. - The target. shall be labelled and dimensioned as
shown in figure 1 herein. The target shall consist of black lines or
marks on a white background. The crosshair without a tolerance block
around it, is the final test fixture alignment crosshair used in setting up
the target.
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