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Application of defect standards |
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|  MIL-P-46530D(AR)
4.5.2 Soundness. The method of inspection shall comply with
all requirements of Eddy Current Flaw Detector, Dwg. 11075203
(Ref), except for those inspection requirements which are reserved
for Government application, as specified herein.
4.5.2.1 Application of defect standards. Master defect
standards, referenced in the Operating Instructions, shall apply
to resolve inspection discrepancies occurring between the results
of defect standards for contractor "soundness" inspection and
(See 6.8).
those for Government "soundness" verification-
4.5.3 Automatic eddy current inspection effectiveness.
Equipment checkout shall be performed as stated in the operation
instructions at the start of each shift and after any adjustment
or shutdown. Upon completion of checkout, cycle the PCS No. 1.
front slot and rear slot standard through the inspection system
during automatic operation. All three standards must be rejected
to assure correct adjustment for reject level and scan limits.
During remainder of shift the PCS No.1 shall be cycled through the
equipment at intervals of 20 5 minutes during automatic
operation.
4.5.3.1 Equipment verification. The Government inspector
will maintain independent of the contractor, a set of standards
and may cycle these standards through the equipment at any time.
Failure of equipment to reject standards will be evidence that the
equipment is not properly adjusted and the contractor will be so
notified.
4.5.4 Soundness verification. After equipment checkout and
verification as specified in 4.5.2 and 4.5.2.1 the entire lot
sample shall be inspected with the equipment operating
Any rejected unit of the sample shall be
automatically.
automatically cycled through the equipment with CAL. button
pressed (to lower the sensitivity one step below that used for
production inspection). Any unit which is rejected at the lower
sensitivity shall be classed as defective.
4.5.5 Phosphate coating. The method of test shall be as
prescribed in TT-C-490 for the type of coating used (see Dwg.
7258846). The prescribed sample projectiles or standard test
panels shall be processed at the start of daily production and at
4-hour intervals, maximum, thereafter. Appearance and weight of
the coating shall be recorded.
4.5.6 Paint adhesion. The method of test shall be as
prescribed in TT-C-490. The test shall be made on the exterior
painted surface of each projectile metal part of the sample
forward of the rotating band. Visible exposure of underlying
phosphate coating or ferrous metal on any unit of the sample, as a
result of the test, shall be recorded as a defect.
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