MIL-S-21520C (Wep)
Periodic Production Sample - From each succeed-
4.2.3
ing production lot of 25 or less upper seals or 25 or less
lower seals, a random sample will be selected by the
Government Inspector for submission to an agency assigned
by the procuring activity to determine compliance of the
stiple with the requirements of the contract, specifica-
tions, and drawings. Disposition of th etest sample shall
be at the discretion of the Material Review Board.
Classification of Tests - The inspection and
4.3
testing of the upper and lower seals shall be classified
as follows:
Production Test - These tests are to be accom-
4.3.1
plished on each upper and lower seal being submitted for
acceptance under the contract. production tests shall be
either performed by the contractor and witnessed by the
Government Inspectors or these tests maY be conducted bY
the Government Inspector. These tests are detailed in 4.5.
Periodic Production Tests - Periodic production
4.3.11
tests are those which are accomplished on samples selected
as specified in 4.2.3, which are representative of the
production of the seals, to determine that the production
meets the requirements of this specification. These tests
are detailed in 4.5 and 4.7. Acceptance shall be based on
no defects in the sample. Failure of the sample will re-
sult in rejection of the production lot.
Preproduction Tests - Preproduction tests are
4.3.2
those which are accomplished on samples selected as speci-
fied in 4.2.1, which are representative of the production
of the upper and lower seals, to determine that the produc-
tion meets the requirements of this specification. These
Acceptance shall be based on
are detailed in 4.5 and 4.6.
no defects in the sample. Failure of the sample to comply
with these requirements will result in the cessation of
production until determination of cause of failure is made
and appropriate correction approved by the procuring
acttvity.
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