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|  MIL-T-63520(AR)
comply with the applicable specification functioning requirements of 4.5.6
before and after the interchange of parts. It shall be the responsibility of
the agency responsible for the test to inform the contracting officer by
letter or other methods satisfactory to the contracting officer, when
selective assembly has become necessary. Statement shall contain, as a
minimum, contractor's name and FSCM, contract number, parts involved in the
selective fit, conditions of parts and rationale for action taken. No hand
refinement of parts shall be permissible without approval by the contracting
officer. NO malfunctions shall be allowed in the functioning tests. Failure
of a control assembly in the interchangeability test shall cause retest or
rejection of the represented lot.
At the discretion of the Government representative, an interchangeability
retest may be allowed without reconditioning the lot. Failure during the
retest shall cause rejection of the represented lot subject to reconditioning
and further test as a reconditioned lot. A sample of 6 control assemblies
from each retest or reconditioned lot shall be tested using the same
procedures described above.
4.6.2 Repair parts. At least 2 parts from each inspection lot of
concurrent repair parts shall be subjected to the interchangeability test
specified in 4.6.3. Failure of any part to meet the interchangeability
requirements shall be cause for rejection of the represented lot, subject to
reconditioning and further test as a reconditioned lot. A sample consisting
of double the number of parts used in the original test shall be tested from
each reconditioned lot using the test methods specified above.
4.6.3 Test method for interchangeability. Control assemblies shall be
tested by disassembling and the reassembling the parts specified below
Parts shall be disassembled from the control and identical parts placed
together and mixed. Any commercial part (screws, pins, etc) rendered
unserviceable by disassembly shall be replaced without penalty to the
interchangeability test.
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