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|  MIL-D-81347C(AS)
(4) Short Duration Interference
Reference 3.2.2 of MIL-D-6181D
All DPS equipment switches shall be considered as manual
switches which are not operated more than twice per normal operational period. Short duration
impulse noise generated by operation of the switches shall be measured in all emission tests but no
limits shall apply.
4.2.3
Preproduction (First Article) Approval - Approval of the pre -
production sample shall be by the procuring activity upon satisfactory completion of all tests. No
production equipments shall be delivered prior to the approval of the preproduction sample. Pre-
fabrication of production equipment prior to the approval of the preproduction sample is at the con-
tractor's own risk. The approved preproduction sample shall be retained by the contractor for his use
in the fabrication and testing of equipment to be submitted for acceptance. The preproduction sample
shall not be considered as one of the equipments under contract.
Production Equipments - Equipments supplied under the contract
4.2.4
shall in all respects, including design, construction, wormanship, performance and quality, be equiv.
alent to the approved preproduction sample. Each equipment shall be capable of successfully paining
the same tests as imposed on the preproduction sample. Evidence of non-compliance with the above
shall constitute cause for rejection and for equipment already accepted by the Government; it shall be
the obligation of the contractor to make necessary corrections as approved by the procuring activity.
4.3
Initial Production Tests - One of the first ten production equip-
ments shall be selected and sent at the contractor's expense to a designated Government laboratory
for tests. This equipment shall be selected by the procuring activity after the equipment has success-
fully passed all individual tests. The preproduct.ion sample shall not be selected for this test.
4.3.1
Scope of Tests - This equipment may be subjected to any and all
tests the procuring activity deems necessary to assure that the production equipment is equivalent to
the previously approved preproduction sample in design, construction, workmanship, performance and
quality and that it meets all applicable requirements.
4.3.2
Accessory Material - In addition to the complete equipment sub-
mitted for Initial Production Tests, the contractor shall also submit such accessory material and data
as necessary to test the equipment;
Initial Production Sample Approval - Approval of the Initial Pro-
4.3.3
duction Sample shall be by the procuring activity upon satisfactory completion of all tests. Any de-
sign, material or performance defect made evident during this test shall be corrected by the contractor
to the satisfaction of the procuring activity. Failure of the Initial Production Sample to pass any of
the tests shall be cause for deliveries of equipment under the contract to cease until proper corrective
action is approved and accomplished. Corrective action shall also be accomplished on equipment
previously accepted when requested by the procuring activity.
Reconditioning of Initial Production Test Sample - On completion
4.3.4
of the initial production test, the equipment shall be reworked by the contractor by replacing all worn
or damaged items. After reworking, the contractor shall resubmit the equipment for acceptance.
4.4
Acceptance Tests - The contractor shall be responsible for
accomplishing the acceptance tests. All inspection and testing shall be under the supervision of the
government inspector. Contractors not having testing facilities satisfactory to the procuring activity
shall engage the service of a commercial testing laboratory acceptable to the procuring activity. The
contractor shall furnish test reports showing qualitative and quantitative results for all acceptance
tests. Such reports shall be signed by an authorized representative of the contractor or laboratory,
as applicable. Acceptance or approval of material during the course of manufacture shall not be
construed as a guarantee of the acceptance of the finished product. Acceptance tests shall consist of
the following:
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