MIL-DTL-14824C(AR)
one copy of his proposed procedures, including descriptions of
equipment (contractor design) and operation procedures (see 6.3).
No change to the procedure shall be made after the original
approval without submission and approval of the proposed changes.
As a minimum, the adequacy of the inspection process shall be
checked by using the standard at the start and finish of each
production shift or change in operator, as well as at the shift
midpoint during production. All channels shall properly indicate
a rejection signal when encountering the notches mentioned in
3.7. If the inspection process is determined to be inadequate,
the condition shall be corrected and all items inspected since
the last acceptable inspection check shall be re-inspected.
Equipment used shall provide for a positive activation of a
buzzer or alarm as well as a light system for each channel to
alert the operator of the signal indications that are the
criteria for rejection. A log book shall be maintained by the
operator of each system which is a minimum, documents the use of
standards, transducers, instrumentation, repairs, reasons for
equipment breakage, if any, and changing of qualified operators
or inspectors. This log book shall be made available when
requested for Government review.
4.4.4.3 Ultrasonic standards. The ultrasonic inspection
standard shall be provided by the contractor for use during the
ultrasonic inspection. The standard shall be machined from an
acceptable projectile in accordance with drawing 9280420 and
shall be inspected for all drawing requirements to determine its
acceptability for use. Government verification of all inspections
performed on the standard is required
4.4.5 Protective coating - thickness. Two samples shall be
selected at random to represent each shift or fraction thereof,
of continuous paint production. The sample projectiles shall be
inspected for paint coating thickness at a minimum of four
separate locations on each projectile. Any projectile failing to
meet the applicable requirements shall be classed defective and
every projectile painted since the last acceptable sample shall
be rejected.
4.4.6 Salt spray. After qualification in accordance with
TT-C-490 or commercial equivalent as approved by the contracting
officer, two(2) salt spray samples shall be taken each week, one
during the first 30 minutes of production and a second at any
other time. Failure to comply with the requirements of 3.2.5
shall be cause for taking the corrective action prescribed in TT-
C-490.
4.4.6.1 Salt spray testing. Salt spray testing shall be
accomplished on production projectiles or sectioned projectiles
that were acceptable at the time of painting and were sectioned
subsequent to painting. If sectioned projectiles are used,
sectioning shall be accomplished to allow testing of all major
areas of the projectiles on an alternating basis. The salt spray
test shall be performed utilizing the equipment and procedures
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