MIL-DTL-23659F
APPENDIX A
b. The initiator shall be tested in accordance with Table A-1. The ILI are divided into test
groups, which are shown in the top of the columns in the table. The required test titles are shown
on the left of the table rows. This test sequence includes both qualitative and quantitative
statistical testing to meet safety and reliability requirements. While initiator augmenting features
such as switches, dielectric gaps, and transformers are acceptable to facilitate packaging, unit
cost and/or other non-safety related parameters; they shall not be relied upon to provide primary
safety characteristics. The ILI primary safety features should be inherent in the basic design of
the initiator without the inclusion of augmenting features, externally or internally. The
contribution to safety of any augmentative feature can be proposed to Safety Review Authority,
but in general the use of augmentative features for this purpose is unacceptable for safety and
performance test requirements. The non-augmented, initiator design features shall provide the
primary safety characteristics. The ILI shall not contain augmentation features when conducting
safety tests A.4.10, and A.4.13. Additionally, the ILI can not contain augmentation features
when conducting sensitivity performance tests A.4.5, A.4.6, and A.4.11. Augmentative features
shall not contribute to the results for these specific test requirements. The 300 firings required in
the All-Fire testing, if passed with no failures, is sufficient to provide a binomial reliability
estimate slightly in excess of 0.99 at 95 percent confidence of the population from which the
sample is drawn. Test assets, if undamaged or not degraded in other certification tests, may be
used in All-Fire testing to supplement the quantity of units used to build reliability.
c. Since the firing properties of an ILI are dependent upon the characteristics of the
device(s) providing electrical firing energy (referred to in this document as the fireset or firing
unit), the characteristics of the fireset used during the certification shall be documented in the
certification report. If a previously certified ILI is to be used with a substantially different fireset
(i.e., a change in transient electrical characteristics greater than 25%), at a minimum the
following tests will need to be repeated using the new fireset: Firing Properties (A.4.5) and High
Firing Voltage (A.4.17).
A.4. REQUIREMENTS
A.4.1. General. Tests shall be performed in accordance with Table A-1, in the sequence
shown. Unless specified otherwise, all tests are conducted at the ambient temperature condition
of +23 ± 10 C (+73 ± 18°F).
A.4.1.1. Test Documentation. Test plans, performance records, equipment, conditions,
results, and analyses shall be documented. A detailed certification test plan shall be developed
and approved by the appropriate safety authority prior to starting the certification tests. The
detailed certification test plan shall provide descriptions of the following: visual inspections and
examinations, fireset, test fixtures, the test firing circuit, and special test equipment that will be
used in conducting each test. A detailed test report shall be provided to the design safety
authority at the completion of the certification testing. At a minimum, this report shall include:
the test data, inspection results, diagnostic records, and explanation of anomalous results.
A.4.1.2. Pre-test Verification. Prior to initiating the test sequence, documentation shall be
available to verify that all of the ILI to be used in this certification meet the manufacturer's
requirements with respect to workmanship, marking, and conformance to manufacturer's
drawings and specifications.
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