MIL-PRF-22710H
3.30 Workmanship. Switches shall be processed in such a manner as to be uniform in quality and shall be free
from cracked or displaced parts and other defects that will affect life, serviceability, or appearance. All molded or
laminated parts shall be free of chips, blemishes, or flakes which are detrimental to the operating functions of the
switch. Gate marks shall not be considered a defect.
4. VERIFICATION
4.1 Classification of inspection. The inspections specified herein are classified as follows:
a. Qualification inspection (see 4.3).
b. Conformance inspection (see 4.4).
4.1.1 Test equipment and inspection facilities. Test and measuring equipment and inspection facilities of sufficient
accuracy, quality, and quantity to permit performance of the required inspection shall be established and maintained
by the contractor. The establishment and maintenance of a calibration system to control the accuracy of the
measuring and test equipment shall be in accordance with ISO-10012, or equivalent system as approved by the
qualifying activity.
4.2 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with
the test conditions specified in the "GENERAL REQUIREMENTS" of MIL-STD-202.
4.3 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to the
Government (see 6.3), on sample units produced with equipment and procedures normally used in production.
4.3.1 Sample size. The number of switches to be subjected to qualification inspection shall be as specified in table
VI. Additional samples of the printed circuit board may be submitted for the solderability test.
4.3.2 Inspection routine. The sample shall be subjected to the inspections specified in table VI, in the order
shown. All sample units shall be subjected to the inspections of group I. The samples shall then be divided as
specified in table VI and subjected to the inspection for their particular group.
4.3.3 Failures. One or more failures shall be cause for refusal to grant qualification approval. Lamp failure shall
not be considered a unit failure, if when the lamp failure is noted, a new lamp is immediately installed and the lamp
functions. Test shall then be continued as required. However, lamp failure for a nonreplaceable item (see 3.1) shall
be considered a unit failure.
4.3.4 Verification of qualification. Every 12 months, the manufacturer shall provide verification of qualification to the
qualifying activity. Continuation is based on meeting the following requirements:
a.
Design of switch has not been modified, (every 12 months).
b.
Verification of group A lot acceptance, (every 12 months).
c.
Periodic group B inspection, (every 36 months).
4.4 Conformance inspection. Inspection of product for delivery shall consist of group A and group B inspection.
4.4.1 Inspection lot. An inspection lot shall consist of all the switches of the same style produced under essentially
the same conditions, and offered for inspection at one time. Similar switches meeting these requirements, but having
different circuit configurations and numbers of switch sections, may be combined to form an inspection lot if the
inspection is performed to the most severe conditions existing in the lot.
4.4.2 Group A inspection. Group A inspection shall consist of the inspections specified in table VII, in the order
shown.
4.4.2.1 Sampling plan. Statistical sampling shall be in accordance with table VII and table VIII. Separate,
randomly selected, group(s) of samples are required for subgroup 1 and subgroup 2. For acceptance of the lot there
shall be zero occurrences of defects.
4.4.2.1.1 Subgroup 1. A sample of parts shall be randomly selected in accordance with table VIII, subgroup 1
sampling plan.
10
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business