MIL-DTL-85670D
4.5.4.8 Verification of compliance by similarity. The following requirements may be verified without testing.
Analysis of the materials and processes, relative to the particular test requirements, shall be compared to units of a
similar type that have been previously subjected to the test. Certification by the contractor of the similarity of existing
materials and processes to those proven by previous tests is subject to approval by the qualifying activity. Any
information regarding changes in materials and processes since the original qualification must be supplied to the
qualifying activity for approval prior to implementing the change. Such changes are subject to requalification to the
extent deemed necessary by the qualifying activity (see 4.4.4).
Fungus. The requirements of MIL-STD-810, method 508.6 shall be fulfilled on acquiring activity acceptance
a.
of the contractor's detailed materials list, and the certification thereof.
Rain. The antenna shall be analyzed with consideration to the test in accordance with MIL-STD-810,
b.
method 506.5.
Hail impact. The radome surfaces which are subject to airstream impingement angles greater than 30°
c.
shall be analyzed to demonstrate compliance with hail impact requirements for class 1 (flight vehicle)
radomes designed to withstand impact of .75 inch-diameter hail stones at the aircraft cruise velocity at the
rate of six impacts per square inch per minute without catastrophic failure.
d.
Static electricity. The antenna shall be analyzed to demonstrate compliance with the precipitation static
electricity requirements as specified for radomes. If charging of external surfaces in the airframe air flow is
detrimental to equipment performance or personnel safety, then equipment shall be finished with anti-static
coating. The measured resistance of the coating shall not be greater than 25 megohms or less than
0.5 megohm per unit area.
e.
Solar radiation (Sunshine). The plastic radome shall be analyzed to demonstrate compliance with solar
radiation requirements as specified for radomes; shall withstand 100 hours of exposure described in MIL-
STD-810, method 505.5 with no degradation of physical or electrical properties.
f.
Fluids. The antenna shall be analyzed to demonstrate compliance with resistance to fluids requirements:
the antenna shall not be softened or permanently damaged by contact with petroleum products or other
fluids common to aircraft operation or maintenance.
4.5.5 Production antennas. Antennas supplied under the production contract shall in all respects, including design,
construction, workmanship, performance, and quality, be equal to the approved qualification sample(s). Each
equipment shall be capable of successfully passing the same tests as imposed on the preproduction sample.
Evidence of non-compliance with the above shall constitute cause for rejection of equipment already accepted by the
Government.
4.6 Conformance inspection. The contractor shall furnish all samples and shall be responsible for accomplishing
the conformance tests. All inspection and testing may be under the supervision of the acquiring activity. The
contractor shall retain test data showing quantitative results for all conformance tests. Such tests shall be
signed/stamped by an authorized representative of the contractor or laboratory, as applicable. Acceptance or
approval of material during the course of manufacture shall not be construed as a guarantee of the acceptance of the
finished product. This specification uses accept on zero defect sampling. Sampling in conformance does not
authorize submission of known defective material, either indicated or actual, nor does it commit the Government to
acceptance of defective material. Conformance tests shall consist of the following:
a.
b.
c.
Special tests (see 4.6.3).
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